Question

How to extract substring from a string in C

Answer 1

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

int main(void) {
    char s[64] = "C general-purpose programming language";
    char dest[64] = "";
    int pos = 5, len = 10;

    strncat(dest, s + pos, len);

    puts(s);
    puts(dest);

    return 0;
}




/*
run:

C general-purpose programming language
eral-purpo

*/

 

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Answer 2

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

int main(void) {
    char s[64] = "C general-purpose programming language";
    char dest[64] = "";
    int start = 5, end = 11;

    strncpy(dest, s + start, end - start);

    puts(s);
    puts(dest);

    return 0;
}




/*
run:

C general-purpose programming language
eral-p

*/

 

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