C language, and then wait online. Eager, what s wrong

It is advisable to look at the basic structure of the program: order, select branches, loops.

But look at your **, even the touch is also very big, I didn't expect ** to be able to write like this. can only write the ** on the book, and even a rookie

The following ** can:

#include

#include

#define n 256

int mystrcmp(char* str1,char* str2)

int i,r=-1;

for(i=0;(*str1+i)!='\0' ||str2+i)!='\0');i++)

if(*(str1+i)==*(str2+i))

r=0;continue;It was originally broken; break jumps out of the loop directly, and the returned r is, of course, 0. But there are also cases where it is not equal, hehe. For example, "123" and "456".

if(*(str1+i)>*str2+i))

r=1;return r;///////

if(*(str1+i)<*str2+i))

r=2;return r;///////

return r;

int main()

int r;

char a[n],b[n];

char *p=a,*q=b;

printf("Please enter the first string:");

scanf("%s",p);gets() doesn't compile on my machine.

printf("Please enter the second string:");

scanf("%s",q);

r=mystrcmp(p,q);

if(r==0)

printf("The two strings are equal");

if(r==1)

printf("The first string is large");

if(r==2)

printf("The second string is large");

return 0;

Result: pig@pig-laptop: $gcc

pig@pig-laptop:~$/

Please enter the first string: abc

Please enter the second string: abc

The two strings are equal pig@pig-laptop: $

Please enter the first string: aji

Please enter the second string: aij

The first string is large pig@pig-laptop: $

Please enter the first string: aij

Please enter the second string: aji

The second string is large

if(r==1)

printf("The second string is large");

if(r==2)

printf("The first string is large");

Change the part of your program to the above, because when comparing letters, a>b, but the ACII code of a is less than b, you are mainly making this mistake, and your program is correct.

There is something wrong with the algorithm.

In the for loop, only the first character of 2 strings is compared, so no matter what string is entered, only the first character is compared, and then the size of the entire string is judged based on the first character alone.

You wrote this and broke after comparing only one character.