CO_assign_q4, C (gcc)

CO_assign_q4

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main() {
	FILE * fp;
	fp = fopen ("output.csv","w");
	srand ((unsigned int ) time (NULL));
    double timeTaken;
    clock_t start;
    for (int size = 5; size <= 250; size +=5){// decrease the time if you get Kill signal (SIGKILL)
		int n = size;
		int a1[n][n];
		int a2[n][n];
		int amul[n][n];
		for(int ro1 =0; ro1<n; ro1++){
			for(int co1 = 0; co1<n; co1++ ){
				a1[ro1][co1] = rand()%10 ;
				int p = rand()%2;
				if (p==1)
					a1[ro1][co1] *= -1;
				}
			}
		for(int ro2 =0; ro2<n; ro2++){
			for(int co2 = 0; co2<n; co2++ ){
				a2[ro2][co2] = rand()%10;
				int q = rand()%2;
				if (q==1)
					a2[ro2][co2]*=-1;
				}
			}
		start = clock();
		for (int i = 1; i<= 5; i++){
			for(int ia = 0; ia <n; ia ++ ){
				for(int ib = 0; ib <n; ib++){
					amul[ia][ib] = 0;
					for(int ic = 0; ic<n; ic++){
						amul[ia][ib] +=a1[ia][ic] * a2[ic][ib];
						}	
					}
				}		
			}
    	timeTaken = (double)(clock() - start)/(CLOCKS_PER_SEC * 5);
    	printf("Time for %d: %.12f \n", n, timeTaken);
    	fprintf(fp,"%d,%d,%d,%.12f\n",n,n*n,3*n*n,timeTaken);
    }
    return 0;
}


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