main.c(114): warning C206: 'sprintf': missing function-prototype

This warning indicates that the function `sprintf` has been used without a function prototype. A function prototype specifies the types of the function's arguments and its return type. Without a function prototype, the compiler may make assumptions about the function's arguments and return type, which could lead to unexpected behavior or errors.

To resolve this warning, you can add a function prototype for `sprintf` before it is used in your code. The function prototype should specify the types of its arguments and its return type. For example:

#include <stdio.h>

int sprintf(char *str, const char *format, ...);

int main() {
    char buffer[100];
    int num = 42;
    sprintf(buffer, "The answer is %d", num);
    printf("%s\n", buffer);
    return 0;
}

In this example, the function prototype for `sprintf` is added at the beginning of the file, before it is used in the `main` function. This tells the compiler the types of the arguments and the return type of `sprintf`, which helps to avoid any potential issues.