如果条件不起作用

Question

我的目的是取两个字符串并比较结果,如果它们都以"ing","ed"结尾或者结尾不匹配.它总是说字符串不匹配.

#include <stdio.h>
#include <conio.h>
#include <string.h>
int ised(char str[]);
int ising(char str[]);

int  main()
{
    char str1[30],str2[30];
    printf("Enter 1st string:\n");
    gets(str1);
    printf("Enter 2nd string:\n");
    gets(str2);
    if((ising(str1))||(ised(str1))||(ising(str2))||(ised(str2)))
    {
        if(ising(str1)&&ising(str2))
        {
            printf("Both strings end with ing");
        }
        else if(ised(str1)&&ised(str2))
        {
        printf("Both strings end with ed");
        }
        else
        printf("Both strings ending do not match");
    }
    else
    printf("One or both strings do not end with ing or ed.Program Quitting...");
    getch();
    return 0;
}
int ising(char str[])
{
    int len,flag=0;
    len=strlen(str);

        if (!(strncpy(&str[len-3],"ing",3)))
                flag=1;
        else
        flag=0; 
return flag;           
}
int ised(char str[])
{
    int len,flag=0;
    len=strlen(str);

        if( !(strncpy(&str[len-2],"ed",2)) )
                flag=1;
        else
        flag=0; 
return flag;           
}

Answer 1

您使用的strncpy是字符串复制,如果要比较字符串,请使用strncmp.

请参阅:strncpy 和strncmp