c - Can't get loop to stop running -

i trying write program rolls 2 dice, calculates number of rolls each side of dice, calculates actual , expected percents asks user roll again. however, loop wont ask user if want continue or stop looping after 5 rolls. not allowed use arrays yet. beginner. :)

#include <stdio.h> #include <stdlib.h> #include <time.h> #include <math.h>  int main(void) {     int i;    int number;    float expected_percent;    int val2=1, val3=1,val4=1,val5=1,val6=1,val7=1;    int val8=1,val9=1,val10=1,val11=1, val12=1 ;    int val;      int rolldice;    int roll_1, roll_2;     float perc2, perc3, perc4, perc5, perc6, perc7, perc8;    float perc9, perc10, perc11, perc12;      float exp2, exp3, exp4, exp5, exp6, exp7, exp8, exp9;    float exp10, exp11, exp12;     char ans, y, y, n, n;     srand(time(null));     do{     printf("how many times want roll dice ? \n \n ");     scanf("%d/n/n",&number);      (i = 0; < number; i++) {         roll_1 = rand() %6+1;         roll_2 = rand() %6 + 1;         rolldice = roll_1 + roll_2;         val = rolldice;         switch (val){             case 2:                 val2++;                 break;             case 3:                 val3++;                 break;             case 4:                 val4++;                 break;             case 5:                 val5++;                 break;             case 6:                 val6++;                 break;             case 7:                 val7++;                 break;             case 8:                 val8++;                 break;             case 9:                 val9++;                 break;             case 10:                 val10++;                 break;             case 11:                 val11++;                 break;             case 12:                 val12++;                 break;         }     }      perc2 = (float)(100 *(float)val2/number);     perc3 = (float)(100 *(float)val3/number);     perc4 = (float)(100 *(float)val4/number);     perc5 = (float)(100 *(float)val5/number);     perc6 = (float)(100 *(float)val6/number);     perc7 = (float)(100 *(float)val7/number);     perc8 = (float)(100 *(float)val8/number);     perc9 = (float)(100 *(float)val9/number);     perc10 = (float)(100 *(float)val10/number);     perc11 = (float)(100 *(float)val11/number);     perc12 = (float)(100 *(float)val12/number);      exp2 = (perc2 / number) * 36;     exp3 = (perc3 / number) * 36;     exp4 = (perc4 / number) * 36;     exp5 = (perc5 / number) * 36;     exp6 = (perc6 / number) * 36;     exp7 = (perc7 / number) * 36;     exp8 = (perc8 / number) * 36;     exp9 = (perc9 / number) * 36;     exp10 = (perc10 / number) * 36;     exp11 = (perc11 / number) * 36;     exp12 = (perc12 / number) * 36;      printf("\n\nroll\ttotal\tsession\t expected\n\n");      printf("2\t%d \t%.2f%% \t  %.2f%% \t \n",val2, perc2, exp2);     printf("3\t%d \t%.2f%% \t  %.2f%% \t \n",val3, perc3, exp3);     printf("4\t%d \t%.2f%% \t  %.2f%% \t \n",val4, perc4, exp4);     printf("5\t%d \t%.2f%% \t  %.2f%% \t \n",val5, perc5, exp5);     printf("6\t%d \t%.2f%% \t  %.2f%% \t \n",val6, perc6, exp6);     printf("7\t%d \t%.2f%% \t  %.2f%% \t \n",val7, perc7, exp7);     printf("8\t%d \t%.2f%% \t  %.2f%% \t \n",val8, perc8, exp8);     printf("9\t%d \t%.2f%% \t  %.2f%% \t \n",val9, perc9, exp9);     printf("10\t%d \t%.2f%% \t  %.2f%% \t \n",val10, perc10, exp10);     printf("11\t%d \t%.2f%% \t  %.2f%% \t \n",val11, perc11, exp11);     printf("12\t%d \t%.2f%% \t  %.2f%% \t \n",val12, perc12, exp12);    }    while (ans == y || y);     printf("\n\nwould roll again? please answer y or n\n\n");    scanf("%c", &ans);     return 0; } 

do {     /* ... */ } while (ans == y || y); 

you should change into

do {     /* ... */ } while (ans == 'y' || ans == 'y');