#include <stdio.h> int bigFirstLetters(char *string) { int words = 0; int inWord = 0; while(string[0]) { char c = string[0]; int AZ = (c >= 'A') && (c <= 'Z'); int az = (c >= 'a') && (c <= 'z'); if (!inWord && AZ) { inWord = 1; } if (inWord && !AZ && !az) { inWord = 0; words++; } string++; } return words; } int main(void) { char *string = "hello My Dear friend."; printf("%d\n", bigFirstLetters(string)); return 0; }