View difference between Paste ID: 6xLACNCX and CNxd0JAr

 /* C programme to replace a strings spaces with %20 */
 #include <stdio.h>
 int main(void)
 {
 	int i,j=0;
 	char in[1000],out[1000];
 	gets(in);
 	for (i=0;in[i]!='\0';i++)
     	{
 		if (in[i] == ' ')
         	{
 			out[j++]='%';
 			out[j++]='2';
 			out[j++]='0';
 		}
 		/*
 		WE CAN ALSO WRITE IT LIKE THAT
 		       if(in[i]==' ')
         	{
             		out[j] = '%';
 			out[j+1] = '2';
 			out[j+2] = '0';
 			j=j+3;
         	}
 		*/
 		else
 		{
 			out[j]=in[i]; //it is also correct out[j++]=in[i]; then we need not to write j++; later
 			j++;
 		}
 	}
 	out[j]='\0';
 	puts(out);
 	return 0;
 }