askisi.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    char frash[30];
    int i, mikos, plithos, arithmos;

    printf("Dwse th frash sou\n");
    fgets(frash, 30, stdin);
    printf("Pliktrologises: %s\n", frash);

    mikos = strlen(frash);
    if (mikos < 20) {
        printf("I frasi pou edwses einai mikri\n");
    } else {
        printf("I frasi pou edwses einai megali\n");
    }
    
    if (mikos % 4 == 0) {
        printf("To mikos tis frasis einai pollaplasio tou 4\n");
    }
    
    printf("dwse ena arithmo anamesa sto 65 kai to 90\n");
    scanf("%d", &arithmos);
    while(arithmos < 65 || arithmos > 90) {
        printf("Lathos eisodos. Ksanadwse ena arithmo anamesa sto 65 kai to 90\n");
        scanf("%d", &arithmos);
    }
    
    for (i=0; i<mikos;i++) {
        if (frash[i] == arithmos) {
            plithos++;
        }
    }

    printf("o xaraktiras vrethike %d fores\n", plithos);

    system("PAUSE");
    return 0;
}