Question

How to convert string to long long number in C

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
 
int main() {
    char s[30] = "948479843849";
    char *endPtr;
     
    long long ll = strtoll(s, &endPtr, 10);

    if (errno == ERANGE) {
        printf("The number is too big for long long");
        return 1;
    }
     
    printf("%lld", ll);
     
    return 0;
}
 
 
/*
run:
 
948479843849
 
*/

 

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