提交记录 #524

编译情况：编译成功

code.c: In function ‘main’:
code.c:62:5: warning: implicit declaration of function ‘gets’; did you mean ‘fgets’? [-Wimplicit-function-declaration]
   62 |     gets(str);
      |     ^~~~
      |     fgets
code.c:79:5: warning: ‘n’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   79 |     printf("%d\n",n);
      |     ^~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cctUgmg6.o: in function `main':
code.c:(.text.startup+0x1b): warning: the `gets' function is dangerous and should not be used.

固定测试点#1:

Accepted

0.001s

292 kB

固定测试点#2:

Accepted

0.000s

872 kB

额外测试点#1:

Runtime Error: - Returning:-8

0.009s

292 kB

H22【选做▪应用】逆波兰算术表达式

#include<stdio.h>
#include<string.h>
#include<math.h>
char str[100],s; int n1=0,n2=0;
int findnum1(int i)
{
    int count=0;
    for(;i>=0;i--)
    {
        if(str[i]==' '&&count!=0)break;
        else if(str[i]==' ')continue;
        n1+=(str[i]-48)*pow(10,count);
        str[i]=' ';
        count++;
    }
    return i;
}
int findnum2(int i)
{
    int count=0;
    for(;i>=0;i--)
    {
        if(str[i]==' '&&count!=0)break;
        else if(str[i]==' ')continue;
        n2+=(str[i]-48)*pow(10,count);
        str[i]=' ';
        count++;
    }
    return i;
}
int findsym()
{
    int i=0;
    for(i=0;i<strlen(str);i++)
    {
        if(str[i]=='+'||str[i]=='-'||str[i]=='*'||str[i]=='/')
        {
            s=str[i];return i-1;
        }
    }
    return -1;
}
void remake(int n,int i)
{
    char c[10];int j=0,J;
    for(j=0;;j++)
    {
        c[j]=n%10+48;
        n=n/10;
        if(n==0)break;
    }
    J=j+1;
    for(j=0;j<J;j++)
    {
        str[i-j]=c[j];
    }
}
int main()
{
    int i,j,I,n; 
    gets(str);
    for(j=0;;j++)
    {
        n1=0;n2=0;
        i=findsym();I=i+1;
        if(i==-1)break;
        i=findnum1(i);
        i=findnum2(i);
        switch(s)
        {
            case '+' :n=n1+n2;break;
            case '-' :n=n2-n1;break;
            case '*' :n=n2*n1;break;
            case '/' :n=n2/n1;break;
        }
        remake(n,I);
    }
    printf("%d\n",n);
    return 0;
}