fork(1) download

copy

#include <stdio.h>
#include <stdlib.h>
 
#define  MAXOP 100
#define NUMBER '0'
 
int getop(char []);
void push(double);
double pop(void);
 
int main(void)
{   
    int type;
    double op2;
    char s[MAXOP];
 
    while ((type = getop (s)) != EOF){
        switch (type){
        case NUMBER:
            push (atof(s));
            break;
        case '+':
            push(pop()+pop());
            break;
        case '-':
            op2=pop();
            push(pop()-op2);
            break;
        case '/':
            op2=pop();
            if (op2 != 0.0)
                push( pop() / op2 );
            else
                printf("error:zero divisor\n");
            break;
        case '*':
            push(pop()*pop());
            break;
        case '\n':
            printf("\t.8g\n",pop());
            break;
        default:
            printf("error:unknow command %s\n",s);
            break;
        }
 
    }
	return 0;
}

prog.c: In function ‘main’:
prog.c:40:20: warning: too many arguments for format [-Wformat-extra-args]
             printf("\t.8g\n",pop());
                    ^~~~~~~~~
/home/n5qos0/ccLKwNYE.o: In function `main':
prog.c:(.text.startup+0x34): undefined reference to `getop'
prog.c:(.text.startup+0x63): undefined reference to `push'
prog.c:(.text.startup+0x6b): undefined reference to `getop'
prog.c:(.text.startup+0x89): undefined reference to `pop'
prog.c:(.text.startup+0xa8): undefined reference to `pop'
prog.c:(.text.startup+0xb7): undefined reference to `push'
prog.c:(.text.startup+0xc1): undefined reference to `pop'
prog.c:(.text.startup+0xcc): undefined reference to `pop'
prog.c:(.text.startup+0xd7): undefined reference to `push'
prog.c:(.text.startup+0xe1): undefined reference to `pop'
prog.c:(.text.startup+0xec): undefined reference to `pop'
prog.c:(.text.startup+0xf7): undefined reference to `push'
prog.c:(.text.startup+0x101): undefined reference to `pop'
prog.c:(.text.startup+0x10c): undefined reference to `pop'
prog.c:(.text.startup+0x117): undefined reference to `push'
prog.c:(.text.startup+0x121): undefined reference to `pop'
collect2: error: ld returned 1 exit status

Standard output is empty