打印乘法口诀和三角所用的算法跟java一样,直接上代码
打印乘法口诀:
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| #include <stdio.h> int main(void) { for (int i = 1; i <= 9; ++i) { for (int j = 1; j <= i; ++j) { printf("%d*%d=%d\t", 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
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三角,同时输出两个三角,一正一倒:
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| #include <stdio.h> int main(void) {
for (int i = 1; i <= 9; ++i) { if ( i % 2 != 0) { for (int j = 1; j <= (9-i)/2; ++j) { printf("%c", ' '); } for (int j = 1; j <= i; ++j) { printf("%c", '*'); } for (int j = 1; j<=(9-i)/2; ++j) { printf("%c", ' '); }
printf("\t");
for (int j = 1; j<= (9-(10-i))/2; ++j) { printf("%c", ' '); } for (int j = 1; j<= (10-i); ++j) { printf("%c", '*'); } for (int j = 1; j<= (9-(10-i))/2; ++j) { printf("%c", ' '); }
printf("\n"); } } return 0; }
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