C Program to Find the Frequency of Every Word in a given String

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This C Program finds frequency of every word in a given string.

Here is source code of the C Program to find the frequency of every word in a given string. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /* 
  2.  * C Program to Find the Frequency of  Every Word in a 
  3.  * given String
  4.  */
  5. #include <stdio.h>
  6. #include <string.h>
  7.  
  8. void main()
  9. {
  10.     int count = 0, c = 0, i, j = 0, k, space = 0;
  11.  
  12.     char str[100], p[50][100], str1[20], ptr1[50][100];
  13.  
  14.     char *ptr;
  15.  
  16.     printf("Enter the string\n");
  17.     scanf(" %[^\n]s", str);
  18.  
  19.     printf("string length is %d\n", strlen(str));
  20.  
  21.     for (i = 0;i<strlen(str);i++)
  22.     {
  23.         if ((str[i] == ' ')||(str[i] == ',' && str[i+1] == ' ')||(str[i] == '.'))
  24.         {
  25.             space++;
  26.         }
  27.     }
  28.  
  29.     for (i = 0, j = 0, k = 0;j < strlen(str);j++)
  30.     {
  31.         if ((str[j] == ' ')||(str[j] == 44)||(str[j] == 46))  
  32.         {    
  33.             p[i][k] = '\0';
  34.             i++;
  35.             k = 0;
  36.         }        
  37.         else
  38.              p[i][k++] = str[j];
  39.     }
  40.  
  41.     k = 0;
  42.  
  43.     for (i = 0;i <= space;i++)
  44.     {
  45.         for (j = 0;j <= space;j++)
  46.         {
  47.             if (i == j)
  48.             {
  49.                 strcpy(ptr1[k], p[i]);
  50.                 k++;
  51.                 count++;
  52.  
  53.                 break;
  54.             }
  55.             else
  56.             {
  57.                 if (strcmp(ptr1[j], p[i]) != 0)
  58.                     continue;
  59.                 else
  60.                     break;
  61.             }
  62.         }
  63.     }
  64.  
  65.     for (i = 0;i < count;i++) 
  66.     {
  67.         for (j = 0;j <= space;j++)
  68.         {
  69.             if (strcmp(ptr1[i], p[j]) == 0)
  70.                 c++;
  71.         }
  72.         printf("%s -> %d times\n", ptr1[i], c);
  73.         c = 0;
  74.     }
  75. }

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Enter the string:
Welcome to Sanfoundry Welcome to C Class
string length is 40
Welcome -> 2 times
to -> 2 times
Sanfoundry -> 1 times
C -> 1 times
Class -> 1 times
 
Enter the string:
Welcome to C Class, Java Class
string length is 30
Welcome -> 1 times
to -> 1 times
C -> 1 times
Class -> 2 times
 -> 1 times
Java -> 1 times

Sanfoundry Global Education & Learning Series – 1000 C Programs.

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If you wish to look at programming examples on all topics, go to C Programming Examples.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn