c++ - invalid operands of types `double' and `int' to binary `operator%'

Question

When compiling gives the error invalid operands of types double ' and int ' to binary ` operator % '

int x, y, z;
float R;
cout <<"Ejercicio N 2"<<endl;
cout <<"De la expresion: R=(x^3*8MOD2DIVY/(3+x^2))/(8-z/7-y*11MOD2) suministrar el valor de tipo entero X,Y,Z"<<endl;
cout <<"Ingrese el valor de X: "; cin>> x;
cout <<"Ingrese el valor de Y: "; cin>> y;
cout <<"Ingrese el valor de Z: "; cin>> z;
R=(pow(x,3)*8%2/y/(3+pow(x,2)))/(8-z/7-y*11%2);
cout <<"La respuesta es: "<<R<<endl<<endl<<endl;

Answer 1

There is no integer result overload of the pow function.

Hence the result is of floating point type, specifically the double type, and the C++ % operator only accepts integer argument.

You can use the fmod function for computing a remainder for floating point type arguments, or you can compute the integer power, e.g. as x*x*x.

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Do note that if there were an integer result pow, then the sub-expression

pow(x,3)*8%2

… would always produce 0.

Can you see why?