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copy

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
char *copyStr(int n,const char *str);
 
int main(void) {
	char srcStr[20],dupStr[80];
	int n;
	printf("enter a string(len<20):");
	scanf("%s",&srcStr);
	printf("n(n<=4)=");
	scanf("%d",&n);
	dupStr=copyStr(n,srcStr);
	printf("%s",dupStr);
	return 0;
}
 
char *copyStr(int n,const char *str){
	int i,j,len=strlen(str);
	char array[80];
	for(i=0;i<n;i++){
		for(j=0;j<len;j++){
			array[len*i+j]=str[j];
		}
	}
	array[len*i]='\0';
	return *array;
}

prog.c: In function 'main':
prog.c:11:8: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[20]' [-Wformat=]
  scanf("%s",&srcStr);
        ^
prog.c:14:8: error: assignment to expression with array type
  dupStr=copyStr(n,srcStr);
        ^
prog.c: In function 'copyStr':
prog.c:28:9: warning: return makes pointer from integer without a cast [-Wint-conversion]
  return *array;
         ^

Standard output is empty