Created
November 24, 2020 00:30
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| #include<stdio.h> | |
| #include<ctype.h> | |
| char stack[100]; | |
| int top = -1; | |
| void push(char x) | |
| { | |
| stack[++top] = x; | |
| } | |
| char pop() | |
| { | |
| if(top == -1) | |
| return -1; | |
| else | |
| return stack[top--]; | |
| } | |
| int priority(char x) | |
| { | |
| if(x == '(') | |
| return 0; | |
| if(x == '+' || x == '-') | |
| return 1; | |
| if(x == '*' || x == '/') | |
| return 2; | |
| return 0; | |
| } | |
| int main() | |
| { | |
| char exp[100]; | |
| char *e, x; | |
| printf("Enter the expression : "); | |
| scanf("%s",exp); | |
| printf("\n"); | |
| e = exp; | |
| while(*e != '\0') | |
| { | |
| if(isalnum(*e)) | |
| printf("%c ",*e); | |
| else if(*e == '(') | |
| push(*e); | |
| else if(*e == ')') | |
| { | |
| while((x = pop()) != '(') | |
| printf("%c ", x); | |
| } | |
| else | |
| { | |
| while(priority(stack[top]) >= priority(*e)) | |
| printf("%c ",pop()); | |
| push(*e); | |
| } | |
| e++; | |
| } | |
| while(top != -1) | |
| { | |
| printf("%c ",pop()); | |
| } | |
| return 0; | |
| } |
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