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#include<stdio.h> #include<stdlib.h> #include<string.h> char *right(char *ms,int len); /*截取一个字符串尾部长为len个字符的子串*/ void main() { long a; int len; char as[10]; char ms[20]; printf("求[1,10000]中的同构数:\n"); for(a=1;a<=10000;a++) { ultoa(a,as,10); /*数a转换为字符串,存入as*/ len=strlen(as); ultoa(a*a,ms,10); if(strcmp(as,right(ms,len))==0) /*比较字符串as与ms长为len的子串是否相等*/ printf("%s 其平方为 %s\n",as,ms); /*相等就是同构数,输出结果*/ } system("pause"); } char *right(char *ms,int len) /*截取字符串尾部长为len子串的函数*/ { int i,j; for(i=0;i<(signed)strlen(ms);ms++); for(j=0;j<len;j++,ms--); return ms; }
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