gets() function doesn't execute

[mohsen]

Hello everyone
In the following code gets () function does not work and the program comes out without executing that.
OF course if I write the gets () function in the first line
It works. Why? Something wrongs with buffer

#include<stdint.h>
#include<string.h>



int main(void){
          
				char names[4][10];
				char city[10];
				char revTemp;
				int i=0;
			
				
				puts("Enter four names :");
				for(i=0;i<4;i++)
					scanf(" %s" , names[i]);
				printf("The orginal names are : %s %s\n" , &names[1][0], &names[2][0]);//before   exchane  names
				for(i=0;i<=9;i++){
									revTemp=names[1][i];
									names[1][i]=names[2][i];
									names[2][i]=revTemp;
				}
				printf("The names after the exchange :%s  %s \n" , &names[1][0] , &names[2][0]);//after  exchange the names
				puts("Enter the city");
				gets(city);//This line doesn't execute ERRORE
	
  return 0;
}

Thank you

[Salem]

1. Do not use gets() -> SourceForge.net: Gets - cpwiki

2. Do not mix input methods (like scanf with gets-soon-to-be-fgets)

scanf typically leaves the \n at the end of a line of input behind (still in the input buffer).
This is a problem, since a \n is exactly what gets/fgets is expecting to terminate its input.

Ideally, you should use ONE input method (fgets) to read all the input, then use sscanf (or anything else appropriate) to parse the buffer in memory.

[mohsen]

Thanks a lot salem
How I should use fgets() in this program
I try to use this but the program crashed.

fgets(city,3);
puts(city);

[Matticus]

You're missing a parameter. If you haven't already, read up on the "fgets()" function to understand how to use it properly.
It also wouldn't hurt to create a small test program to play around with "fgets()" before implementing it in your current project.

[mohsen]

Thanks guys