Basic C program to print sum of squares of 4 numbers

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#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b,c,d,sumsq;
    printf("\nEnter 1st number...");
    scanf("%d",&a);
    printf("\nEnter 2nd number...");

    scanf("%d",&b);
    printf("\nEnter 3rd number...");
    scanf("%d",&c);
    printf("\nEnter 4th number...");
    scanf("%d",&d);
    a=a*a;
    b=b*b;
    c=c*c;
    d=d*d;
    sumsq=a+b+c+d;
    printf("Sum of squares is = %d",sumsq);
    return 0;
}