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#include <stdio.h>
int main()
{
    int low, high, i, flag;
    printf("Enter two numbers(intervals): ");
    scanf("%d %d", &low, &high);
 
    printf("Prime numbers between %d and %d are: ", low, high);
 
    while (low < high)
    {
        flag = 0;
 
        for(i = 2; i <= low/2; ++i)
        {
            if(low % i == 0)
            {
                flag = 1;
                break;
            }
        }
 
        if (flag == 0)
            printf("%d ", low);
 
        ++low;
int i=0;
unsigned long int digit;
char str[12],ch;
puts(“Enter the number (less than 10 digit)”);
scanf(“%lu”,&digit);
ultoa(digit,str,10); /*converts an unsigned long int to string*/
while(str[i]!=’\0')
{
ch=str[i];
i++;
switch(ch)
{
case ’1':
printf(“ONE “);
break;
case ’2':
printf(“TWO “);
break;
case ’3':
printf(“THREE “);
break;
case ’4':
printf(“FOUR “);
break;
case ’5':
printf(“FIVE “);
break;
case ’6':
printf(“SIX “);
break;
case ’7':
printf(“SEVEN “);
break;
case ’8':
printf(“EIGHT “);
break;
case ’9':
printf(“NINE “);
break;
case ’0':
printf(“ZERO “);
break;
}
}
char buffer[1000];
char *word;
size_t word_len;
 
printf("enter block of text, terminate with newline (<enter>):\n");
fgets(buffer, sizeof buffer, stdin);
 
word = strtok(buffer, " ");
while (word) 
{
    word_len = strlen(word);
    printf("\"%s\" has %d characters\n",word,word_len);
    word = strtok(NULL, " ");
}
int num1, num2, i, j, flag, temp, count = 0;
 
    printf("Enter the value of num1 and num2 \n");
    scanf("%d %d", &num1, &num2);
    if (num2 < 2)
    {
        printf("There are no primes upto %d\n", num2);
        exit(0);
    }
    printf("Prime numbers are \n");
    temp = num1;
    if ( num1 % 2 == 0)
    {
        num1++;
    }
    for (i = num1; i <= num2; i = i + 2)
    {
        flag = 0;
        for (j = 2; j <= i / 2; j++)
        {
            if ((i % j) == 0)
            {
                flag = 1;
                break;
            }
        }
        if (flag == 0)
        {
            printf("%d\n", i);
            count++;
        }
    }
    printf("Number of primes between %d & %d = %d\n", temp, num2, count);
}
}

prog.c: In function ‘main’:
prog.c:30:6: error: stray ‘\342’ in program
 puts(“Enter the number (less than 10 digit)”);
      ^
prog.c:30:7: error: stray ‘\200’ in program
 puts(“Enter the number (less than 10 digit)”);
       ^
prog.c:30:8: error: stray ‘\234’ in program
 puts(“Enter the number (less than 10 digit)”);
        ^
prog.c:30:9: error: ‘Enter’ undeclared (first use in this function)
 puts(“Enter the number (less than 10 digit)”);
         ^~~~~
prog.c:30:9: note: each undeclared identifier is reported only once for each function it appears in
prog.c:30:15: error: expected ‘)’ before ‘the’
 puts(“Enter the number (less than 10 digit)”);
               ^~~
prog.c:30:46: error: stray ‘\342’ in program
 puts(“Enter the number (less than 10 digit)”);
                                              ^
prog.c:30:47: error: stray ‘\200’ in program
 puts(“Enter the number (less than 10 digit)”);
                                               ^
prog.c:30:48: error: stray ‘\235’ in program
 puts(“Enter the number (less than 10 digit)”);
                                                ^
prog.c:31:7: error: stray ‘\342’ in program
 scanf(“%lu”,&digit);
       ^
prog.c:31:8: error: stray ‘\200’ in program
 scanf(“%lu”,&digit);
        ^
prog.c:31:9: error: stray ‘\234’ in program
 scanf(“%lu”,&digit);
         ^
prog.c:31:10: error: expected expression before ‘%’ token
 scanf(“%lu”,&digit);
          ^
prog.c:31:13: error: stray ‘\342’ in program
 scanf(“%lu”,&digit);
             ^
prog.c:31:14: error: stray ‘\200’ in program
 scanf(“%lu”,&digit);
              ^
prog.c:31:15: error: stray ‘\235’ in program
 scanf(“%lu”,&digit);
               ^
prog.c:32:1: warning: implicit declaration of function ‘ultoa’ [-Wimplicit-function-declaration]
 ultoa(digit,str,10); /*converts an unsigned long int to string*/
 ^~~~~
prog.c:33:15: error: stray ‘\342’ in program
 while(str[i]!=’\0')
               ^
prog.c:33:16: error: stray ‘\200’ in program
 while(str[i]!=’\0')
                ^
prog.c:33:17: error: stray ‘\231’ in program
 while(str[i]!=’\0')
                 ^
prog.c:33:18: error: stray ‘\’ in program
 while(str[i]!=’\0')
                  ^
prog.c:33:20: warning: missing terminating ' character
 while(str[i]!=’\0')
                    ^
prog.c:33:20: error: missing terminating ' character
 while(str[i]!=’\0')
                    ^~
prog.c:34:1: error: expected ‘)’ before ‘{’ token
 {
 ^
prog.c:39:6: error: stray ‘\342’ in program
 case ’1':
      ^
prog.c:39:7: error: stray ‘\200’ in program
 case ’1':
       ^
prog.c:39:8: error: stray ‘\231’ in program
 case ’1':
        ^
prog.c:39:10: warning: missing terminating ' character
 case ’1':
          ^
prog.c:39:10: error: missing terminating ' character
 case ’1':
          ^~
prog.c:40:8: error: stray ‘\342’ in program
 printf(“ONE “);
        ^
prog.c:40:9: error: stray ‘\200’ in program
 printf(“ONE “);
         ^
prog.c:40:10: error: stray ‘\234’ in program
 printf(“ONE “);
          ^
prog.c:40:15: error: stray ‘\342’ in program
 printf(“ONE “);
               ^
prog.c:40:16: error: stray ‘\200’ in program
 printf(“ONE “);
                ^
prog.c:40:17: error: stray ‘\234’ in program
 printf(“ONE “);
                 ^
prog.c:42:6: error: stray ‘\342’ in program
 case ’2':
      ^
prog.c:42:7: error: stray ‘\200’ in program
 case ’2':
       ^
prog.c:42:8: error: stray ‘\231’ in program
 case ’2':
        ^
prog.c:42:10: warning: missing terminating ' character
 case ’2':
          ^
prog.c:42:10: error: missing terminating ' character
 case ’2':
          ^~
prog.c:43:8: error: stray ‘\342’ in program
 printf(“TWO “);
        ^
prog.c:43:9: error: stray ‘\200’ in program
 printf(“TWO “);
         ^
prog.c:43:10: error: stray ‘\234’ in program
 printf(“TWO “);
          ^
prog.c:43:15: error: stray ‘\342’ in program
 printf(“TWO “);
               ^
prog.c:43:16: error: stray ‘\200’ in program
 printf(“TWO “);
                ^
prog.c:43:17: error: stray ‘\234’ in program
 printf(“TWO “);
                 ^
prog.c:45:6: error: stray ‘\342’ in program
 case ’3':
      ^
prog.c:45:7: error: stray ‘\200’ in program
 case ’3':
       ^
prog.c:45:8: error: stray ‘\231’ in program
 case ’3':
        ^
prog.c:45:10: warning: missing terminating ' character
 case ’3':
          ^
prog.c:45:10: error: missing terminating ' character
 case ’3':
          ^~
prog.c:46:8: error: stray ‘\342’ in program
 printf(“THREE “);
        ^
prog.c:46:9: error: stray ‘\200’ in program
 printf(“THREE “);
         ^
prog.c:46:10: error: stray ‘\234’ in program
 printf(“THREE “);
          ^
prog.c:46:17: error: stray ‘\342’ in program
 printf(“THREE “);
                 ^
prog.c:46:18: error: stray ‘\200’ in program
 printf(“THREE “);
                  ^
prog.c:46:19: error: stray ‘\234’ in program
 printf(“THREE “);
                   ^
prog.c:48:6: error: stray ‘\342’ in program
 case ’4':
      ^
prog.c:48:7: error: stray ‘\200’ in program
 case ’4':
       ^
prog.c:48:8: error: stray ‘\231’ in program
 case ’4':
        ^
prog.c:48:10: warning: missing terminating ' character
 case ’4':
          ^
prog.c:48:10: error: missing terminating ' character
 case ’4':
          ^~
prog.c:49:8: error: stray ‘\342’ in program
 printf(“FOUR “);
        ^
prog.c:49:9: error: stray ‘\200’ in program
 printf(“FOUR “);
         ^
prog.c:49:10: error: stray ‘\234’ in program
 printf(“FOUR “);
          ^
prog.c:49:16: error: stray ‘\342’ in program
 printf(“FOUR “);
                ^
prog.c:49:17: error: stray ‘\200’ in program
 printf(“FOUR “);
                 ^
prog.c:49:18: error: stray ‘\234’ in program
 printf(“FOUR “);
                  ^
prog.c:51:6: error: stray ‘\342’ in program
 case ’5':
      ^
prog.c:51:7: error: stray ‘\200’ in program
 case ’5':
       ^
prog.c:51:8: error: stray ‘\231’ in program
 case ’5':
        ^
prog.c:51:10: warning: missing terminating ' character
 case ’5':
          ^
prog.c:51:10: error: missing terminating ' character
 case ’5':
          ^~
prog.c:52:8: error: stray ‘\342’ in program
 printf(“FIVE “);
        ^
prog.c:52:9: error: stray ‘\200’ in program
 printf(“FIVE “);
         ^
prog.c:52:10: error: stray ‘\234’ in program
 printf(“FIVE “);
          ^
prog.c:52:16: error: stray ‘\342’ in program
 printf(“FIVE “);
                ^
prog.c:52:17: error: stray ‘\200’ in program
 printf(“FIVE “);
                 ^
prog.c:52:18: error: stray ‘\234’ in program
 printf(“FIVE “);
                  ^
prog.c:54:6: error: stray ‘\342’ in program
 case ’6':
      ^
prog.c:54:7: error: stray ‘\200’ in program
 case ’6':
       ^
prog.c:54:8: error: stray ‘\231’ in program
 case ’6':
        ^
prog.c:54:10: warning: missing terminating ' character
 case ’6':
          ^
prog.c:54:10: error: missing terminating ' character
 case ’6':
          ^~
prog.c:55:8: error: stray ‘\342’ in program
 printf(“SIX “);
        ^
prog.c:55:9: error: stray ‘\200’ in program
 printf(“SIX “);
         ^
prog.c:55:10: error: stray ‘\234’ in program
 printf(“SIX “);
          ^
prog.c:55:15: error: stray ‘\342’ in program
 printf(“SIX “);
               ^
prog.c:55:16: error: stray ‘\200’ in program
 printf(“SIX “);
                ^
prog.c:55:17: error: stray ‘\234’ in program
 printf(“SIX “);
                 ^
prog.c:57:6: error: stray ‘\342’ in program
 case ’7':
      ^
prog.c:57:7: error: stray ‘\200’ in program
 case ’7':
       ^
prog.c:57:8: error: stray ‘\231’ in program
 case ’7':
        ^
prog.c:57:10: warning: missing terminating ' character
 case ’7':
          ^
prog.c:57:10: error: missing terminating ' character
 case ’7':
          ^~
prog.c:58:8: error: stray ‘\342’ in program
 printf(“SEVEN “);
        ^
prog.c:58:9: error: stray ‘\200’ in program
 printf(“SEVEN “);
         ^
prog.c:58:10: error: stray ‘\234’ in program
 printf(“SEVEN “);
          ^
prog.c:58:17: error: stray ‘\342’ in program
 printf(“SEVEN “);
                 ^
prog.c:58:18: error: stray ‘\200’ in program
 printf(“SEVEN “);
                  ^
prog.c:58:19: error: stray ‘\234’ in program
 printf(“SEVEN “);
                   ^
prog.c:60:6: error: stray ‘\342’ in program
 case ’8':
      ^
prog.c:60:7: error: stray ‘\200’ in program
 case ’8':
       ^
prog.c:60:8: error: stray ‘\231’ in program
 case ’8':
        ^
prog.c:60:10: warning: missing terminating ' character
 case ’8':
          ^
prog.c:60:10: error: missing terminating ' character
 case ’8':
          ^~
prog.c:61:8: error: stray ‘\342’ in program
 printf(“EIGHT “);
        ^
prog.c:61:9: error: stray ‘\200’ in program
 printf(“EIGHT “);
         ^
prog.c:61:10: error: stray ‘\234’ in program
 printf(“EIGHT “);
          ^
prog.c:61:17: error: stray ‘\342’ in program
 printf(“EIGHT “);
                 ^
prog.c:61:18: error: stray ‘\200’ in program
 printf(“EIGHT “);
                  ^
prog.c:61:19: error: stray ‘\234’ in program
 printf(“EIGHT “);
                   ^
prog.c:63:6: error: stray ‘\342’ in program
 case ’9':
      ^
prog.c:63:7: error: stray ‘\200’ in program
 case ’9':
       ^
prog.c:63:8: error: stray ‘\231’ in program
 case ’9':
        ^
prog.c:63:10: warning: missing terminating ' character
 case ’9':
          ^
prog.c:63:10: error: missing terminating ' character
 case ’9':
          ^~
prog.c:64:8: error: stray ‘\342’ in program
 printf(“NINE “);
        ^
prog.c:64:9: error: stray ‘\200’ in program
 printf(“NINE “);
         ^
prog.c:64:10: error: stray ‘\234’ in program
 printf(“NINE “);
          ^
prog.c:64:16: error: stray ‘\342’ in program
 printf(“NINE “);
                ^
prog.c:64:17: error: stray ‘\200’ in program
 printf(“NINE “);
                 ^
prog.c:64:18: error: stray ‘\234’ in program
 printf(“NINE “);
                  ^
prog.c:66:6: error: stray ‘\342’ in program
 case ’0':
      ^
prog.c:66:7: error: stray ‘\200’ in program
 case ’0':
       ^
prog.c:66:8: error: stray ‘\231’ in program
 case ’0':
        ^
prog.c:66:10: warning: missing terminating ' character
 case ’0':
          ^
prog.c:66:10: error: missing terminating ' character
 case ’0':
          ^~
prog.c:67:8: error: stray ‘\342’ in program
 printf(“ZERO “);
        ^
prog.c:67:9: error: stray ‘\200’ in program
 printf(“ZERO “);
         ^
prog.c:67:10: error: stray ‘\234’ in program
 printf(“ZERO “);
          ^
prog.c:67:16: error: stray ‘\342’ in program
 printf(“ZERO “);
                ^
prog.c:67:17: error: stray ‘\200’ in program
 printf(“ZERO “);
                 ^
prog.c:67:18: error: stray ‘\234’ in program
 printf(“ZERO “);
                  ^
prog.c:118:1: error: expected expression before ‘}’ token
 }
 ^
prog.c:29:14: warning: unused variable ‘ch’ [-Wunused-variable]
 char str[12],ch;
              ^~

Standard output is empty