Question

编一个程序，将两个字符串s1和s2比较，如果s1>s2

#include "math.h"

main()
{ char s1[100],s2[100];int i,j,l1,l2,min;
printf("input string s1:\n");
gets(s1);
printf("input string s2:\n");
gets(s2);

l1=strlen(s1); /*求出两个字符串的长度*/
l2=strlen(s2);
min=l1<l2 ? l1: l2; /*求出两字符串中的较小者*/

i=0;j=0;
while(s1[i]==s2[i])
{j++;i++;}
if(j==min)
{printf(" s1 = s2 : 0\n");}
else
{for(i=j;i<100;i++)
if(s1[i]<s2[i])
{printf(" s1 < s2 : -%d\n",abs(s1[i]-s2[i])); break;}
else
{printf(" s1 > s2 : %d\n",abs(s1[i]-s2[i])); break;}
}
}

Answer 1

#include "stdio.h"

main()
{ char s1[100],s2[100];int i;
printf("input string s1:\n");
gets(s1);
printf("input string s2:\n");
gets(s2);

for(i=0;s1[i]!='\0' && s2[i]!='\0';i++)
{
if(s1[i]==s2[i])
continue;
if(s1[i]<s2[i])
{printf(" s1 < s2 : -%d\n",abs(s1[i]-s2[i])); break;}
else
{printf(" s1 > s2 : %d\n",abs(s1[i]-s2[i])); break;}
}
if(s1[i]==s2[i])
printf(" s1 = s2\n");
}

Answer 2

你既然用了strlen了，为什么不用strcmp呢？