#include <stdio.h>

#define SPACE ' '
#define ENDOFSTRING \0

int getNumberOfSpaces(char[] charArray);

int main() {
    char inputString[1000];
    int numberOfSpaces;

    numberOfSpaces = getNumberOfSpaces(inputString);

    printf("Number of spaces in string is: %d\n", numberOfSpaces);
    return 0;
}

int getNumberOfSpaces(char[] charArray) {
    int lineIndex;
    int numberOfSpaces=0;

    for(lineIndex=0;lineIndex < 1000;lineIndex++) {
        if(charArray[lineIndex] == ENDOFSTRING)
            break;
        else if(charArray[lineIndex] == SPACE)
            numberOfSpaces++;
    }
    return numberOfSpaces;
}