复合函数基础

#include <stdio.h>
int f (int x){
    return x + 1;
}
int h (int x){
    return x * 2;
}
int main(){
    int x = 1;
    printf("x = %d, f(x) = %d, h(x) = %d\n", x, f(x), h(x));
    printf("x = %d, f(h(x)) =%d, h(f(x)) = %d\n", x, f(h(x)), h(f(x)));
    return 0;
}