co_assign1_ques_4, C (gcc)

co_assign1_ques_4

#include <stdio.h>
#include<stdlib.h>
#include<time.h> 
void multiply(int N,int mat1[][N], int mat2[][N], int res[][N])
{
    int i, j, k;
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
        {
            res[i][j] = 0;
            for (k = 0; k < N; k++)
                res[i][j] += mat1[i][k]*mat2[k][j];
        }
    }
}
 
int main()
{
    FILE* fp;
    fp=fopen("Book3.csv","w");
    for(int size=1;size<=700;size+=5){
				    int N=size;
					double time;
				    clock_t start;
				    int mat1[N][N];
				    int mat2[N][N];
				    int p,q;
				    for(p=0;p<N;p++)
				    {
					for(q=0;q<N;q++)
					{
					    mat1[p][q]=1;
					    mat2[p][q]=1;
					}
				    }
				    int res[N][N]; // To store result
				    int i, j;
				    start=clock();
				    for(i=0;i<5;i++){
				    	multiply(size,mat1, mat2, res);
				    }
				    time= (double)(clock()-start)/(CLOCKS_PER_SEC*5);///CLOCKS_PER_SEC; 
				    printf("\n%d\n Time:%.12f\n\n",size,time);
				 	fprintf(fp,"%d,%d,%d,%.12f\n",N,N*N,3*N*N,time);
		}
		fclose(fp);
    return 0;
}


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