c - 字符串或不同语句代码中的隐藏或特殊字符

Question

如何使 fgets(或类似语句)的输入字符串 S1 等于我声明的静态字符串 S2？

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

main() {
    char s1[80];
    char s2[] = "This is a test.";
    int l1, l2;

    system("clear");
    printf("%s\n\n", s2);
    printf("Please type exactly the above sentence: ");
    fgets(s1,80,stdin);

    l1=strlen(s1);
    l2=strlen(s2);
    printf("\n String entered for S1, have a length of %d:\n %s", l1, s1);
    printf("\n String static  for S2, have a legnth of %d:\n %s", l2, s2);
    if(s1==s2)
        printf("\n\nOk! they're with the same length!\n");
    else
        printf("\n\nNop! They are NOT the same.\n");
    return(0);
}

Answer 1

您正在进行指针比较，而不是字符串比较。要比较字符串的内容，请使用 strcmp (docs) :

if (strcmp(s1, s2) == 0)
...