Question

How to get the first N characters of a string in C

Answer 1

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

int main(void) {
    char s[] = "java c c++ c# php python";

    char *first_N_chars = malloc(strlen(s) + 1);
    if (first_N_chars == NULL) {
        puts("malloc error");
        exit(1);
    }
    
    int N = 12;
    strncpy(first_N_chars, s, N); 
    first_N_chars[N] = '\0';
    
    printf("%s", first_N_chars);
    
    free(first_N_chars);
}




/*
run:

java c c++ c

*/

 

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