C编程基础-基础篇 4

#include <stdio.h>

int main() {
    int x = 10;
    while (x > 0) {
        printf("number: %d\n", x);
        x--;
    }
    return 0;
}

number: 10
number: 9
number: 8
number: 7
number: 6
number: 5
number: 4
number: 3
number: 2
number: 1

#include <stdio.h>

int main() {
    int x = 9;
    do {
        x--;
        printf("number: %d\n",x);
    } while (x > 10);
    return 0;
}

number: 8

#include <stdio.h>

int main() {
    for (int i = 0; i < 10; ++i) {
        printf("No. %d: Hello C Language!\n", i);
    }
    return 0;
}

No. 0: Hello C Language!
No. 1: Hello C Language!
No. 2: Hello C Language!
No. 3: Hello C Language!
No. 4: Hello C Language!
No. 5: Hello C Language!
No. 6: Hello C Language!
No. 7: Hello C Language!
No. 8: Hello C Language!
No. 9: Hello C Language!

#include <stdio.h>

int main() {
    printf("\n九九乘法表\n\n");
    for (short i = 1; i < 10; ++i) {
        for (short j = 1; j < i + 1; ++j) {
            short x = i * j;
            printf(" %dx%d=%-2d", j, i, x);
        }
        printf("\n");
    }
    return 0;
}

九九乘法表

 1x1=1 
 1x2=2  2x2=4 
 1x3=3  2x3=6  3x3=9 
 1x4=4  2x4=8  3x4=12 4x4=16
 1x5=5  2x5=10 3x5=15 4x5=20 5x5=25
 1x6=6  2x6=12 3x6=18 4x6=24 5x6=30 6x6=36
 1x7=7  2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49
 1x8=8  2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64
 1x9=9  2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81