fcfs cpu

#include <stdio.h>

int main(void) {
    int n, at[10], bt[10], ct[10], tat[10], wt[10], sum, i, j, k;
    float totaltat = 0, totalwt = 0;

    // Prompt user to enter the number of processors
    printf("Enter No of processors: ");
    scanf("%d", &n);

    // Input the arrival times of each processor
    for(i = 0; i < n; i++) {
        printf("Enter the arrival time of processor %d: ", i + 1);
        scanf("%d", &at[i]);
    }

    // Input the burst times of each processor
    for(i = 0; i < n; i++) {
        printf("Enter the burst time of processor %d: ", i + 1);
        scanf("%d", &bt[i]);
    }

    // Initialization of the first sum to the arrival time of the first process
    sum = at[0];

    // Calculation of completion times for each processor
    for(j = 0; j < n; j++) {
        sum = sum + bt[j];  // Increment sum by the burst time
        ct[j] = sum;        // Set completion time for the current process
    }

    // Calculation of turn around time
    for(k = 0; k < n; k++) {
        tat[k] = ct[k] - at[k];    // Turnaround time is completion time minus arrival time
        totaltat = totaltat + tat[k];  // Accumulate total turnaround time
    }

    // Calculation of waiting time
    for(i = 0; i < n; i++) {
        wt[i] = tat[i] - bt[i];    // Waiting time is turnaround time minus burst time
        totalwt = totalwt + wt[i]; // Accumulate total waiting time
    }

    // Print the results
    printf("Process\tAT\tBT\tCT\tTAT\tWT\n");
    for(i = 0; i < n; i++) {
        printf("\nP%d\t%d\t%d\t%d\t%d\t%d\t\n", i + 1, at[i], bt[i], ct[i], tat[i], wt[i]);
    }

    // Print average turnaround time and average waiting time
    printf("average of turn around time: %0.1f\n", totaltat / n);
    printf("average of waiting time: %0.1f\n", totalwt / n);

    return 0;
}