Input of multiple char arrays isn't working-CodePudding

char toFind[100];
char replace[100];
int pos = 0;
printf("Enter a text: ");
scanf("%[^\n]", str);
printf("Enter a search pattern: ");
scanf("%[^\n]", toFind);
printf("Enter a substitute: ");
scanf("%[^\n]", replace);
pos = strnfnd(0, toFind);
strins(pos, replace);
printf("Der Text ist: %s", str);

This code sample let me read the value for str but skips the other two scanf. I have no idea why. What can I do to fix this?

Ps: str is a global char array

CodePudding user response：

After this call of scanf

scanf("%[^\n]", str);

the new line character '\n' still is present in the input buffer.

So the next call of scanf

scanf("%[^\n]", toFind);

that reads input until the new line character '\n' is encountered reads nothing.

You should write for example

scanf("%[^\n]%*c", str);

to remove the new line character '\n' from the input buffer.

Here is a demonstration program

#include <stdio.h>

int main( void )
{
    char s[100];
    
    scanf( "