Simplified and improved code B6.
- Changed variable names and made prSize and blkSize global variables - Added note in main function
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@ -1,117 +1,96 @@
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#include<iostream>
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#include <iostream>
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using namespace std;
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int blksize[] = {100, 500, 200, 300, 600};
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int blocks[] = {100, 500, 200, 300, 600};
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int processes[] = {212, 417, 112, 426};
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int blkSize = sizeof(blocks) / sizeof(blocks[0]);
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int prSize = sizeof(processes) / sizeof(processes[0]);
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void firstfit(int pr[], int pr_size, int blk[], int blk_size)
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{
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for(int i = 0; i < pr_size; i++)
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{
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bool check = false;
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for(int j = 0; j < blk_size; j++)
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{
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if((blk[j] - pr[i]) >= 0)
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{
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blk[j] = blk[j] - pr[i];
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cout<<"\nProcess with value "<<pr[i]<<" allocated at block "<<j+1;
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check = true;
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break;
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}
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}
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if(!check)
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{
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cout<<"\nProcess with value "<<pr[i]<<" not allocated";
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}
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void FirstFit() {
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cout<<endl<<"FIRST FIT:";
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for (int i=0; i<prSize; i++) {
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bool check = false;
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for(int j=0; j<blkSize; j++) {
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if ((blocks[j] - processes[i] >= 0)) {
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blocks[j] -= processes[i];
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check = true;
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cout<<endl<<"Process "<<processes[i]<<" has been allocated to block "<<j+1;
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break;
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}
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}
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}
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void bestfit(int pr[], int pr_size, int blk[], int blk_size)
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{
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for(int i = 0; i < pr_size; i++)
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{
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bool check = false;
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int k, store = 999;
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for(int j = 0; j < blk_size; j++)
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{
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if((blk[j] - pr[i]) >= 0 && (blk[j] - pr[i]) < store)
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{
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k = j + 1;
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store = blk[j] - pr[i];
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check = true;
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}
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}
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if(!check)
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{
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cout<<"\nProcess with value "<<pr[i]<<" not allocated";
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}
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else{
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blk[k - 1] = blk[k - 1] - pr[i];
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cout<<"\nProcess with value "<<pr[i]<<" allocated at block "<<k;
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" has not been allocated.";
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}
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}
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}
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void worstfit(int pr[], int pr_size, int blk[], int blk_size)
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{
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for(int i = 0; i < pr_size; i++)
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{
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bool check = false;
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int k, store = -1;
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for(int j = 0; j < blk_size; j++)
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{
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if((blk[j] - pr[i]) >= 0 && (blk[j] - pr[i]) > store)
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{
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k = j + 1;
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store = blk[j] - pr[i];
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check = true;
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}
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}
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if(!check)
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{
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cout<<"\nProcess with value "<<pr[i]<<" not allocated";
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}
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else{
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blk[k - 1] = blk[k - 1] - pr[i];
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cout<<"\nProcess with value "<<pr[i]<<" allocated at block "<<k;
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}
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void NextFit() {
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int j = 0;
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cout<<endl<<"NEXT FIT:";
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for (int i=0; i<prSize; i++) {
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bool check = false;
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for (int k=0; k<blkSize; k++) {
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if ((blocks[j] - processes[i]) >= 0) {
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blocks[j] = blocks[j] - processes[i];
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cout<<endl<<"Process "<<processes[i]<<" has been allocated to block "<<j+1;
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check = true;
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break;
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}
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j = (j + 1) % blkSize;
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}
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}
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void nextfit(int pr[], int pr_size, int blk[], int blk_size)
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{
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int j = 0;
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for(int i = 0; i < pr_size; i++)
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{
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bool check = false;
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for(int k = 0; k < blk_size; k++)
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{
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if((blk[j] - pr[i]) >= 0)
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{
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blk[j] = blk[j] - pr[i];
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cout<<"\nProcess with value "<<pr[i]<<" allocated at block "<<j+1;
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check = true;
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break;
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}
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j = (j + 1) % blk_size;
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}
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if(!check)
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{
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cout<<"\nProcess with value "<<pr[i]<<" not allocated";
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" has not been allocated.";
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}
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}
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}
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int main()
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{
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int blk_size = sizeof(blksize)/sizeof(blksize[0]);
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int pr_size = sizeof(processes)/sizeof(processes[0]);
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////Note: Use only one function at a time to get the correct output
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//firstfit(processes, pr_size, blksize, blk_size);
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//bestfit(processes, pr_size, blksize, blk_size);
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//worstfit(processes, pr_size, blksize, blk_size);
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nextfit(processes, pr_size, blksize, blk_size);
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return 0;
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void BestFit() {
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for (int i=0; i<prSize; i++) {
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bool check = false;
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int k, store = 999;
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for (int j=0; j<blkSize; j++) {
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if ((blocks[j] - processes[i]) >= 0 && (blocks[j] - processes[i]) < store) {
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k = j + 1;
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store = blocks[j] - processes[i];
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check = true;
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}
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" was not allocated to any block.";
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}
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else {
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blocks[k - 1] -= processes[i];
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cout<<endl<<"Process "<<processes[i]<<" was allocated to block "<<k;
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}
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}
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}
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void WorstFit() {
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bool check = false;
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for (int i=0; i<prSize; i++) {
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int k, store = -1;
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for (int j=0; j<blkSize; j++) {
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if ((blocks[j] - processes[i] >= 0 && (blocks[j] - processes[i] > store))) {
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k = j + 1;
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store = blocks[j] - processes[i];
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check = true;
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}
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" was not allocated to any block.";
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}
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else {
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blocks[k - 1] -= processes[i];
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cout<<endl<<"Process "<<processes[i]<<" was allocated to block "<<k;
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}
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}
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}
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int main () {
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// ONLY RUN ONE FUNCTION AT A TIME.
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// FirstFit();
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// NextFit();
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BestFit();
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// WorstFit();
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return 0;
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}
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