Comparing one string and one string from an array of strings in C

[kosvid]

//What i am doing wrong in the strcmp line!I still cant understand it and i am here for so many hours!Help

The compiler doesnt give me any errors or warnings

#include <stdio.h>
#include <stdlib.h>
#define SIZEX 45


int main() {
	
	char *a[50][7];
	a[0][4]="kosvid";
	int flag=0;
	int x;
	char z[10];
	
	printf("Please enter the username \n");
    scanf("%s",z);

	for(x=0;x<=SIZEX;x++)
	         {
	        	if(strcmp(a[x][4],z)==0)
		        {
			        flag=1;
		        }
	        }
	        
	        
	return 0;
}

[weaknessforcats]

 a[0][4]="kosvid";

Read this: https://bytes.com/topic/c/insights/7...rrays-revealed

And then tell me what you think this code does.