Question

C语言编程：将一个字符插入到字符串中的指定位置

Answer 1

Description:把字符串截取成2段，将指定字符插入，让你将它们再连接。 #include <stdio.h> #include <string.h> int main(void) { char str[256],s1[256],s2[256]; char ch; int i,j=0,k=0; printf("输入字符串:\n"); gets(str); printf("输入要插入的字符和位置:\n"); scanf("%c%d",ch,n); for(i=0;i<n-1;i++) { s1[j++]=str[i]; } s1[j]=ch;//插入指定字符 for(j=i;j<strlen(str);j++) { s2[k++]=str[j]; } strcat(s1,s2); puts(s2); return 0; }

Answer 2

#include <stdio.h> #include <stdlib.h> #include <string.h> char * strca(char *a,const char *b,int c) { int lenofa=0; int lenofb=0; for (;a[lenofa]!= '\0 ';lenofa++); for (;b[lenofb]!= '\0 ';lenofb++); for (int i=lenofa;i> =c;i--) a[i+lenofb]=a[i]; for (i=0;i <lenofb;i++) a[c+i]=b[i]; return a; } void main() { char *stra=new char [255]; strcpy(stra, "123789 "); char *strb= "456 "; strca(stra,strb,3); printf( "%s ",stra); system( "pause "); }