Question

How to add a sequence of digits to a string in C

Answer 1

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

void AddSequenceOfDigitsToString(char str[], int start, int end) {
    char numstr[16];
    int index = 0;
    for (int n = start; n < end; n++) {
        sprintf(numstr, "%d", n);
        sprintf(str + index, "%d", n);
        index += strlen(numstr);
    }
}

int main() {
    char str[32] = "";

    AddSequenceOfDigitsToString(str, 3, 10);

    puts(str);

    return 0;
}



/*
run:

3456789

*/

 

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