中缀转后缀

#include<stdio.h>int top=0;char stack[100];void push(char x){stack[top++]=x;}void pop(){printf("%c",stack[--top]);}void inToPost(char *a){int i;for(i=0;a[i]!='\0';i++){if(a[i]>='a'&&a[i]<='z')printf("%c",a[i]);else if(a[i]=='+'||a[i]=='-'){while(top!=0&&stack[top-1]!='('){pop();}push(a[i]);}else if(a[i]=='*'||a[i]=='/'){push(a[i]);}else if(a[i]=='('){push(a[i]);}else if(a[i]==')'){while(stack[top-1]!='('){pop();}top--;}}while(top!=0)pop();}int main(){char a[100];gets(a);inToPost(a);return 0;}