Prog#085: Convert comma to semicolon

/* 
Program#85
Convert comma to semicolon
*/

#include <stdio.h>
main(){
char a[100],b[100];
int i;

i=0;
scanf("%c",&a[i]);
while(a[i]!='$'){
i++;
scanf("%c",&a[i]);
}
a[i]='\0';

i=0;
while(a[i]!='\0'){
if(a[i]==',')
b[i]=';';
else
b[i]=a[i];
i++;
}
b[i]='\0';
printf("\n %s\n %s",a,b);
}