字符比较错误输出并且在C中没有比较

Question

C 不比较字符。我已经尝试了很多次，但总是遇到问题。

我的代码是

#include <stdio.h>
#include <string.h>


int main(){
    int palavra[16];
    int frase[201];
    gets(palavra);
    gets(frase);
    printf("%s\n",palavra);
    printf("%s\n",frase);
    int i;
    int palavrasNaFrase=0;
    int tamanhoPalavra=strlen(palavra);
    int tamanhoFrase=strlen(frase);
    printf("tamanho frase %d\n",tamanhoFrase);
    for(i=0; i<tamanhoFrase; i++){
        printf("i = %d\n",i);
        printf("caracter: %c\n",palavra[0]);
        printf("caracter: %c\n",frase[i]);
        if(frase[i] == palavra[0]){
            printf("C is not comparing characters\n");/*
            int j=i+1,k=1;
            int letrasIguais=1;
            int cont=1;
            while(cont<tamanhoPalavra){
                if(frase[j]==palavra[k]){
                    letrasIguais++;
                }
                j++;
                k++;
                cont++;
            }
            if(letrasIguais==tamanhoPalavra){
                palavrasNaFrase++;
            }*/
        }
    }
    //printf("%d\n",palavrasNaFrase);
    return(0);
}

输入

ANA

ANAGOSTADEUMABANANA

出

ANA

ANAGOSTADEUMABANANA

tamanho frase 19

i = 0

caracter: A

caracter: A

i = 1

caracter: A

caracter: O

i = 2

caracter: A

caracter: D

i = 3

caracter: A

caracter: A

i = 4

caracter: A

caracter: A

C is not comparing characters

i = 5

caracter: A

caracter: ©

i = 6

...

caracter: ­

0

进程返回 0 (0x0) 执行时间:4.696 s按任意键继续。

实在是太麻烦了，不知道该怎么办。请有人帮助我，如果有人能找到问题所在，为什么如此被窃听。有太多错误和不应该发生的事情发生。我已经尝试和搜索了很多次，并且总是找到使用 string[position]==string2[position] 逐个字符比较字符串的方法是正确的，但在这个程序中不起作用，我不知道为什么有这么多错误!请有人帮助我并给我一盏灯!我究竟做错了什么？谢谢

Answer 1

您正在像这样定义数组:

int palavra[16];
int frase[201];

虽然它保留了足够的空间，但在比较 char 与 char 时存在一个问题:比较 int 与 int (多字符与多字符)可能就是您想要的(并且您可能收到关于指针类型的警告你忽略了):

if(frase[i] == palavra[0]){

您必须更改声明以使用 char 代替

char palavra[16];
char frase[201];

编译时出现警告，您会得到预期的结果。修复警告也会修复您的代码(警告摘录，编辑掉多余的警告):

$ gcc -Wall toto.c
toto.c: In function 'main':
toto.c:8:10: warning: passing argument 1 of 'gets' from incompatible pointer type
     gets(palavra);
          ^
In file included from toto.c:1:0:
c:\gnatpro\7.4.2\x86_64-pc-mingw32\include\stdio.h:491:17: note: expected 'char *' but argument is of type 'int *'

          ^
In file included from toto.c:1:0:
c:\gnatpro\7.4.2\x86_64-pc-mingw32\include\stdio.h:491:17: note: expected 'char *' but argument is of type 'int *'
   char *__cdecl gets(char *_Buffer) __MINGW_ATTRIB_DEPRECATED_SEC_WARN;
                 ^
     ^
toto.c:11:5: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int *'
 [-Wformat=]
     printf("%s\n",frase);
     ^
toto.c:14:31: warning: passing argument 1 of 'strlen' from incompatible pointer type
     int tamanhoPalavra=strlen(palavra);
                               ^