Question

How to check if string is a negative integer in C

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main(void) {
    char str[8] = "-5";

    int n = atoi(str);

    printf("%s", (n < 0) ? "yes" : "no");

    return 0;
}





/*
run:

yes

*/

 

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