Manual string comparison (pointer question)

describe

Write a function , Realize the comparison of two strings . That is to write one by yourself strcmp function , The function prototype is strcmp（char *p1,char *p2）, set up p1 Point to string s1,p2 Point to string s2. Ask to be s1=s2 when , The return value is 0;(s1,s2 The length is equal and does not exceed 100) if s1！=s2, Return the first different character between them ASCII Code difference （ Such as “BOY” And “BAD”, The first 2 Different letters ,“O” And “A” The difference is 79-65=14）; If s1>s2, Then a positive value is output , Otherwise, negative value is output .（ This question requires using a pointer ）

Input
First act N, It means that there is N Group test data . Next N Row representation N Group test data , Each set of test data contains two strings , Space separates the middle , And ensure that the characters in each string are lowercase .

Output
Output the result of two string comparison .

sample input 1

2
abcdef aaaaaa
a z

sample output 1

1
-25

#include<stdio.h>

int strcmp(char *p1,char *p2){
    
	while(*p1 && *p2 && (*p1==*p2)){
    
		p1++;
		p2++;
	}
	return *p1-*p2;
}

int main(){
    
	int n,i,t;
	char s1[100],s2[100];
	while(scanf("%d",&n)!=EOF){
    
		for(i=0;i<n;i++){
    
			scanf("%s %s",&s1,&s2);
			t = strcmp(s1,s2);
			printf("%d\n",t);
			t = 0; 
		}
	}
}