angles of triangle

//angles of triangle
#include<stdio.h>
#include<math.h>
int main(){
    int a1,a2,a3;
    printf("Enter first angle: \n");
    scanf("%d",&a1);
    printf("Enter second angle: \n");
    scanf("%d",&a2);
    a3=180-(a1+a2);//sum of angles of a triangle is a+b+c=180
    printf("Third angle = %d",a3);
    return 0;
}