#include <stdio.h>
int main(){
    int nbredenote;
    int sommedesnotes;
    scanf ("%d", &nbredenote);
    for (int i=0; i<nbredenote; i++){
        scanf ("%d", &sommedesnotes);
    }
    return 0;
}

In function 'main':
Line 6: error: 'for' loop initial declaration used outside C99 mode