在char数组中的特定位置插入一个字符

Question

正如标题所说，我想使用char array样式在C中插入另一个字符，而不是使用库string，请避免使用缓冲区函数好吧，只有基本的:)。

char sentence[100],*p = NULL;
cin.get(sentence,100);
char replaceChar; // after What character should we insert
cin>>replaceChar;
char insertingChar; // the character we are inserting after the replaceChar;
cin >> insertingChar ; 
p = strchr(sentence , replace);
while(p != NULL){
//and this is I could think of ...
}

所以我们说我们有这句话：＆＃34;我想要苹果＆＃34;，replaceChar = a，insertChar =＆＃39; *＆＃39;;

结果应该是：＆＃34;我在* pples＆＃34;

Answer 1

这会将字符向右移动，为插入留出空间。

void rshift( char *s ){
    int n = strlen( s);
    s[ n + 1] = 0;
    while( n ){
       s[ n ] = s[ n-1 ];
       n--;
    } 
}

int main(){

    char *p = strchr(sentence , replace);

    if( p ) {
         p++; // insert after 
         rshift( p );
         *p = insertingChar;
    }
}