Multiplication of two complex numbers

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#include <stdio.h>
typedef struct complex {
float real;
float imag;
} complex;
complex mul(complex n1, complex n2);
int main( ) {
complex n1, n2, result;
printf("For 1st complex number \n");
printf("Enter the real and imaginary parts: ");
scanf("%f %f", &n1.real, &n1.imag);
printf("\nFor 2nd complex number \n");
printf("Enter the real and imaginary parts: ");
scanf("%f %f", &n2.real, &n2.imag);
result = mul(n1, n2);
printf("mul = %.1f + %.1fi", result.real, result.imag);
return 0;
}
complex mul(complex n1, complex n2) {
complex temp;
temp.real = n1.real * n2.real - n1.imag *n2.imag;
temp.imag = n1.real * n2.imag + n1.imag * n2.real;
return (temp);
}

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