How to handle repeated string concatenation in C langua…

When there are repeated concatenated strings when using the sprintf function, you can use the snprintf function as a replacement. The snprintf function can limit the maximum length of the concatenated string to prevent overflow.

The example code is shown below:

#include <stdio.h>

int main() {
    char str[20];
    int a = 10;
    int b = 20;

    snprintf(str, sizeof(str), "%d%d", a, b);
    printf("%s\n", str);

    return 0;
}

In the code above, we replaced the sprintf function with the snprintf function and specified the maximum length of the string as 20. This way, even if the combined length of a and b exceeds 20, there will be no overflow and the strings will not be concatenated repeatedly. The output is “1020”.