C: هياكل التكرار

#include <stdio.h>

int main(void) {
    int count = 1;
    while (count <= 5) {
        printf("Lap %d\n", count);
        count++;
    }
    printf("Done!\n");
    return 0;
}

Lap 1
Lap 2
Lap 3
Lap 4
Lap 5
Done!

#include <stdio.h>

int main(void) {
    int sum = 0;
    int num = 0;
    printf("Enter positive integers to sum, 0 to finish: ");
    scanf("%d", &num);
    while (num != 0) {
        sum += num;
        scanf("%d", &num);
    }
    printf("Sum: %d\n", sum);
    return 0;
}

Enter positive integers to sum, 0 to finish: 10 20 30 0
Sum: 60

#include <stdio.h>

int main(void) {
    int num;
    do {
        printf("Enter a number 1-10: ");
        scanf("%d", &num);
    } while (num < 1 || num > 10);
    printf("You entered: %d\n", num);
    return 0;
}

Enter a number 1-10: 15
Enter a number 1-10: 0
Enter a number 1-10: 7
You entered: 7

for (initialization; condition; update) {
    loop body;
}

#include <stdio.h>

int main(void) {
    for (int i = 1; i <= 5; i++) {
        printf("%d ", i);
    }
    printf("\n");
    return 0;
}

1 2 3 4 5

#include <stdio.h>

int main(void) {
    int i = 1;
    for (; i <= 5; ) {
        printf("%d ", i);
        i++;
    }
    printf("\n");
    return 0;
}

#include <stdio.h>

int main(void) {
    for (int i = 0; i < 3; i++) {
        printf("i = %d\n", i);
    }
    return 0;
}

#include <stdio.h>

int main(void) {
    int rows = 3;
    int cols = 5;
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}

* * * * *
* * * * *
* * * * *

#include <stdio.h>

int main(void) {
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= i; j++) {
            printf("%d*%d=%-4d", j, i, i * j);
        }
        printf("\n");
    }
    return 0;
}

1*1=1
1*2=2   2*2=4
1*3=3   2*3=6   3*3=9
1*4=4   2*4=8   3*4=12  4*4=16
1*5=5   2*5=10  3*5=15  4*5=20  5*5=25
1*6=6   2*6=12  3*6=18  4*6=24  5*6=30  6*6=36
1*7=7   2*7=14  3*7=21  4*7=28  5*7=35  6*7=42  7*7=49
1*8=8   2*8=16  3*8=24  4*8=32  5*8=40  6*8=48  7*8=56  8*8=64
1*9=9   2*9=18  3*9=27  4*9=36  5*9=45  6*9=54  7*9=63  8*9=72  9*9=81

#include <stdio.h>

int main(void) {
    for (int i = 1; i <= 10; i++) {
        if (i == 5) {
            break;
        }
        printf("%d ", i);
    }
    printf("\nStopped at 5\n");
    return 0;
}

1 2 3 4
Stopped at 5

#include <stdio.h>

int main(void) {
    int nums[] = {3, 7, 2, 9, 5, 1};
    int target = 9;
    int found = 0;
    for (int i = 0; i < 6; i++) {
        if (nums[i] == target) {
            printf("Found %d at index %d\n", target, i);
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("%d not found\n", target);
    }
    return 0;
}

Found 9 at index 3

#include <stdio.h>

int main(void) {
    for (int i = 1; i <= 10; i++) {
        if (i % 3 == 0) {
            continue;
        }
        printf("%d ", i);
    }
    printf("\nMultiples of 3 skipped\n");
    return 0;
}

1 2 4 5 7 8 10
Multiples of 3 skipped

#include <stdio.h>

int main(void) {
    int nums[] = {12, 45, 3, 67, 89, 23, 56};
    int count = 0;
    for (int i = 0; i < 7; i++) {
        if (nums[i] > 50) {
            count++;
        }
    }
    printf("Numbers greater than 50: %d\n", count);
    return 0;
}

Numbers greater than 50: 3

#include <stdio.h>

int main(void) {
    int sum = 0;
    for (int i = 1; i <= 100; i++) {
        sum += i;
    }
    printf("Sum from 1 to 100: %d\n", sum);
    return 0;
}

Sum from 1 to 100: 5050

#include <stdio.h>

int main(void) {
    int scores[] = {85, 92, 78, 96, 61};
    int len = 5;
    for (int i = 0; i < len; i++) {
        printf("Student%d: %d %s\n", i + 1, scores[i], scores[i] >= 60 ? "Pass" : "Fail");
    }
    return 0;
}

Student1: 85 Pass
Student2: 92 Pass
Student3: 78 Pass
Student4: 96 Pass
Student5: 61 Pass

#include <stdio.h>

int main(void) {
    int num;
    while (1) {
        printf("Enter a number (0 to quit): ");
        scanf("%d", &num);
        if (num == 0) {
            break;
        }
        printf("You entered: %d\n", num);
    }
    printf("Goodbye!\n");
    return 0;
}

int i = 0;
while (i < 10) {
    printf("%d", i);
}

#include <stdio.h>

int main(void) {
    int n = 5;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= i; j++) {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}

*
* *
* * *
* * * *
* * * * *

#include <stdio.h>

int main(void) {
    int a = 48, b = 18;
    int orig_a = a, orig_b = b;
    while (b != 0) {
        int temp = a % b;
        a = b;
        b = temp;
    }
    printf("GCD of %d and %d is %d\n", orig_a, orig_b, a);
    return 0;
}

GCD of 48 and 18 is 6