View Code of Problem 51

#include<stdio.h>
#include<string.h>
int main()
{
	int n,i,j,sum=0;
	int a[10][10];
	scanf("%d", &n);
	for (i = 0; i < n; i++)
		for (j = 0; j < n; j++)
			scanf_s("%d", &a[i][j]);
	for (i = 0; i < n; i++)
		for (j = 0; j < i + 1; j++)
			sum = sum + a[i][j];
	printf("%d", sum);
	return 0;
}
/*
Main.c: In function 'main':
Main.c:10:4: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    scanf_s("%d", &a[i][j]);
    ^~~~~~~
    scanf
/usr/bin/ld: /tmp/ccqmZQzX.o: in function `main':
Main.c:(.text.startup+0x5c): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status
*/