fork download

copy

#include <stdio.h>
 
int main(void) {
 
	int a,b;
	scanf("%d %d",&a,&b);
	int arr[a][b];
 
	for(int i=0; i<a; i++){
		for(int j=0; j<b; j++){
			scanf("%d",&arr[i][j]);
		}
	}
	for(int j=0; j<b; j++){
		int sum=0;
		for(int i=0; i<a; i++){
			sum=sum+arr[i][j];
		}
	printf("the sum of colume %d is %d\n",i,sum);
 
	}
 
	return 0;
}
 

prog.c: In function ‘main’:
prog.c:19:40: error: ‘i’ undeclared (first use in this function)
  printf("the sum of colume %d is %d\n",i,sum);
                                        ^
prog.c:19:40: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&a,&b);
  ^~~~~~~~~~~~~~~~~~~~
prog.c:11:4: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&arr[i][j]);
    ^~~~~~~~~~~~~~~~~~~~~~

Standard output is empty