In this source code example, we will see how to use the sprintf() function in C programming with an example.

Function Overview

The sprintf() function is found in the C library <stdio.h>. It lets you make a string from different types of data, like numbers or other strings. Instead of showing the result on the screen like printf(), sprintf() saves the result in a buffer or a string.

Source Code Example

#include <stdio.h> int main() { char buffer[100]; // A place to save our new string // Using a number in a string int age = 30; sprintf(buffer, "Ram is %d years old.", age); printf("%s\n", buffer); // Making a string from a number and another string char hobby[] = "painting"; double hours = 3.5; sprintf(buffer, "Ram spends %.1lf hours every day on %s.", hours, hobby); printf("%s\n", buffer); // Making a string from three strings char subject[] = "C programming"; char verb[] = "is"; char adjective[] = "fun"; sprintf(buffer, "For Ram, %s %s %s.", subject, verb, adjective); printf("%s\n", buffer); return 0; } 

Output

Ram is 30 years old. Ram spends 3.5 hours every day on painting. For Ram, C programming is fun. 

Explanation

Here's what the code does:

1. It shows how to use sprintf() to add a number to a string.

2. It shows how you can mix different things like numbers and strings to make a new string.

3. It shows how to make a string by joining three other strings together.

This shows how handy sprintf() can be when you want to make new strings in C.