c語(yǔ)言字符串比較是否相等

小億
115
2024-01-10 15:58:33

在C語(yǔ)言中,可以使用strcmp函數(shù)來(lái)比較兩個(gè)字符串是否相等。strcmp函數(shù)的原型如下:

int strcmp(const char *str1, const char *str2);

該函數(shù)接受兩個(gè)參數(shù),分別是要比較的兩個(gè)字符串。如果兩個(gè)字符串相等,則返回值為0;如果str1小于str2,則返回值小于0;如果str1大于str2,則返回值大于0。以下是一個(gè)示例代碼:

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

int main() {
    char str1[] = "Hello";
    char str2[] = "Hello";
    char str3[] = "Hi";

    if (strcmp(str1, str2) == 0) {
        printf("str1 and str2 are equal.\n");
    } else {
        printf("str1 and str2 are not equal.\n");
    }

    if (strcmp(str1, str3) == 0) {
        printf("str1 and str3 are equal.\n");
    } else {
        printf("str1 and str3 are not equal.\n");
    }

    return 0;
}

運(yùn)行上述代碼,輸出結(jié)果如下:

str1 and str2 are equal.
str1 and str3 are not equal.

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