求助C语言编程............

Question

编写程序，实现从键盘输入一行字符串，将该字符串中所有的apple换成orange.如：I have an apple.Do you like apple? 变为I have an orange.Do you like orange?

Answer 1

 #include<stdio.h>
#include<stdlib.h>
int main()
{
    char s[]="I have an apple Do you like apple";
    char s1[]="apple";
    char s2[]="orange";
    int a[10],i,j,k,n=0,h,m=0;
    for(i=0;s[i]!='\0';i++)
        for(j=i,k=0;s1[k]==s[j];k++,j++)
            if(s1[k+1]=='\0')
            {
                m++;
                a[n++]=j-k;
                break;
            }
    for(n=0;n<m;n++)
        for(i=a[n],h=0;s[i]!='\0'&&s2[h]!='\0';)
            s[i++]=s2[h++];
    printf("%s\n",s);
    system("pause");
    return 0;
}