How to reset do while loop within while loop? - c

Question

#include <stdio.h>
int main()
{
int comp,loop=1,tcomp=0;
char cont;
char name[50];
float donate=0,total,gtotal;
printf("\nGot representative? [Y to continue]: ");
scanf("%s", &cont);
while(cont=='y'){
printf("\nRepresentative name : ");
scanf("%s", &name);
printf("How many companies? : ");
scanf("%d", &comp);
tcomp+=comp;
do{
printf("Enter amount of donation : ");
scanf("%f", &donate); loop++;
total+=donate;}
while(loop<=comp);
printf("%s : %.2f\n", name, total);
printf("\nGot representative? [Y to continue]: ");
scanf("%s", &cont);}
printf("\nTotal Representative : %d", tcomp);
gtotal+=total;
printf("\nTotal Donations : %.2f\n", gtotal);
}
Current output :
Got representative? [Y to continue]: y
Representative name : ABC
How many companies? : 3
Enter amount of donation : 1
Enter amount of donation : 2
Enter amount of donation : 3
ABC : 6.00
Got representative? [Y to continue]: y
Representative name : ZXC
How many companies? : 3
Enter amount of donation : 1
ZXC : 7.00
As you can see here, the 2nd loop did not reset and it's summing the numbers of first loop. How do I rectify this? How do I make it that the loop starts fresh each time? p/s : I was asked specifically to use while and do while loop.

Answer 1

Below your corrected code.
int main()
{
int comp,loop=1,tcomp=0;
char cont;
char name[50];
float donate=0,total=0,gtotal=0;
printf("\nGot representative? [Y to continue]: ");
scanf("%c", &cont);
while(cont=='y')
{
printf("\nRepresentative name : ");
scanf("%s", name);
printf("How many companies? : ");
scanf("%d", &comp);
tcomp+=comp;
loop=0;
total=0;
do
{
printf("Enter amount of donation : ");
scanf("%f", &donate); loop++;
total+=donate;
}
while(loop<comp);
printf("%s : %.2f\n", name, total);
printf("\nGot representative? [Y to continue]: ");
scanf("%c", &cont);
gtotal+=total;
}
printf("\nTotal Representative : %d", tcomp);
printf("\nTotal Donations : %.2f\n", gtotal);
return 0;
}
As you can see:
You must reset loop variable before each loop where amount are asked.
You must reset total before that loop
You must save to gtotal for each iteration of first while loop.
You must use %c instead of %s to get a single char: scanf("%c", &cont);