C Exercises: Sum of all numerical values (positive integers) embedded in a sentence

C Basic Declarations and Expressions: Exercise-145 with Solution

Write a C program to sum of all numerical values (positive integers) embedded in a sentence.

Input:
Sentences with positive integers are given over multiple lines. Each line is a character string containing one-byte alphanumeric characters, symbols, spaces, or an empty line. However the input is 80 characters or less per line and the sum is 10,000 or less

Sample Solution:

C Code:

#include <stdio.h>
#include <stdlib.h>
char text[128];
int main(void) {
  int i, j, k;
  int result = 0;
  char temp[8];
  printf("Input Sentences with positive integers:\n");
  scanf("%s", text);
  i = 0;
  while (text[i]) {
    for (;
      (text[i] < '0' || '9' < text[i]) && text[i]; i++);

    if ('0' <= text[i] && text[i] <= '9') {
      for (j = 0;
        '0' <= text[i] && text[i] <= '9'; j++, i++) {
        temp[j] = text[i];
      }

      temp[j] = '\0';
      result += atoi(temp);
    }
  }
  printf("\nSum of all numerical values embedded in a sentence:\n");
  printf("%d\n", result);
  return 0;
}

Sample Output:

Input Sentences with positive integers:
5littleJackand2mouse.

Sum of all numerical values embedded in a sentence:
7

Flowchart:

C programming Code Editor:

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