concatenate two integers in C code example

Example 1: c program to add two numbers

#include 
int main() {    

    int number1, number2, sum;
    
    printf("Enter two integers: ");
    scanf("%d %d", &number1, &number2);

    // calculating sum
    sum = number1 + number2;      
    
    printf("%d + %d = %d", number1, number2, sum);
    return 0;
}

Example 2: c code to add two numbers

int n,m;
printf("%d",n+m);