warning: return type defaults to ‘int’ [-Wreturn-type]

Question

I\'m a Linux user who started learning C and I\'m trying to compile this source that I typed:

#include 
main()
{
        float c,d;
        c          


        

Answer 1

main()

should be

int main()

In C89, the default return type is assumed to be int, that's why it works.