c语言高手，帮忙看看这个程序怎么了？

#include /*应为下边用到strcmp(),所以要加这句*/ #include #include #include definite_intergral(char s[3],double lower,double upper,double a,double b,double c); main() { double f; f=definite_intergral(char s[3],double lower,double upper,double a,doubl