matrix multiplication in c
#include <stdio.h>
int main()
{ int a_rows,a_cols,b_rows,b_cols,i,j,k,sum=0;
printf("Enter the rows and columns for first matrix (row)(col) :\n");
scanf("%d %d",&a_rows,&a_cols);
printf("Enter the rows and columns for second matrix (row)(col) :\n");
scanf("%d %d",&b_rows,&b_cols);
int a[a_rows][a_cols], b[b_rows][b_cols],matrix[10][10];
if(a_cols != b_rows){
printf("Sorry! We can't multiply the matrix because the column number of matrix 1 and the row number of matrix 2 aren't same !!\n");
}else{
printf("Enter elements for first matrix :\n");
for(i = 0; i < a_rows; i++){
for(j = 0; j< a_cols; j++){
scanf("%d",&a[i][j]);
}
}
printf("Enter elements for second matrix :\n");
for(i = 0; i < b_rows; i++){
for(j = 0; j < b_cols; j++){
scanf("%d",&b[i][j]);
}
}
printf("multiplying matrix....\n");
//multiplying matrix
for(i=0; i < a_rows; i++){
for(j = 0; j < b_cols; j++){
for(k = 0; k < a_cols; k++){
sum+=a[i][k] * b[k][j];
}
matrix[i][j] = sum;
sum=0;
}
printf("\n");
}
printf("first matrix :\n");
for(i = 0; i < a_rows; i++){
for(j = 0; j< a_cols; j++){
printf("%d ",a[i][j]);
}
printf("\n");
}
printf("\n\n");
printf("second matrix :\n");
for(i = 0; i < b_rows; i++){
for(j = 0; j< b_cols; j++){
printf("%d ",b[i][j]);
}
printf("\n");
}
printf("Multiplied matrix :\n");
for(i = 0; i < a_rows; i++){
for(j = 0; j< b_cols; j++){
printf("%d ",matrix[i][j]);
}
printf("\n");
}
}
return 0;
}