What is the usage of strncmp function?

The usage of strncmp function is to compare the first n characters of string str1 and str2. It is a string comparison function. The code is [int strcmp(char *str1,char * str2, int n)].

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strncmp Function usage:

Function prototype

int strcmp(char *str1,char * str2，int n)

Function

Compare the first n characters of string str1 and str2 character.

Header file

#include 

Return value

Return value: Return integer value: When str1551862083d0782c87c6d6045f54f36f7str2, the return value is >0.

Other instructions: None at the moment.

Description

(1) str1: the first string to be compared;

(2) str2: the second string to be compared String;

(3) n: n is the number of characters for the comparison between the specified str1 and str2;

Example:

#include #include int main(void) { char *str1="Hello,I am sky2098,I liking programing!"; char *str2="Hello,I am sky2098,gramk has gone。"; int n=13; //指定比较前13个字符 int inttemp; inttemp=strncmp(str1,str2,n); //将字符串比较的返回值保存在int型变量inttemp中 if(inttemp<0) { printf("strlen(str1) < strlen(str2)"); } else if(inttemp>0) { printf("strlen(str1) > strlen(str2)"); } else { printf("strlen(str1) == strlen(str2)"); } return 0; }

#include #include int main(void) { char *str1="Hello,I am sky2098,I liking programing!"; char *str2="Hello,I am sky2098,gramk has gone。"; int n=strlen(str2); int inttemp; inttemp=strncmp(str1,str2,n); //将字符串比较的返回值保存在int型变量inttemp中 if(inttemp<0) { printf("strlen(str1) < strlen(str2)"); } else if(inttemp>0) { printf("strlen(str1) > strlen(str2)"); } else { printf("strlen(str1) == strlen(str2)"); } return 0; }

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