Question

How to concatenate command line arguments in C

Answer 1

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

int main(int argc, char *argv[]) {

    int size = 0;
    for(int i = 1; i < argc; i++)
        size += strlen(argv[i]);

    char *s = calloc(++size, sizeof(char));

    for(int i = 1; i < argc; i++) {
        strcat(s, argv[i]);
        strcat(s, " ");
    }

    puts(s);

    free(s);

    return 0;
}





/*
run

arg1 arg2 arg3

*/

 

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