初学者c语言程序简单的,c语言简单程序---初学者

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素数的筛选 include include define N 1000 int mainint argc, char* argv[] { int i,j,num[N]; fori0;i main { int x,s,t,d; scanf“d“, sx60; tx/6060; dx/60/60; printf“d时d分d秒“,d,t,s; } 三个数的交换 include void main { int a,b,c,t; scanf“ddd“, printf“The original numberad,bd,cd\n“,a,b,c; ta,ab,bt; ta,ac,ct; printf“after swapad,bd,cd“,a,b,c; } switch语句的运用 include main { int a,m; printf“please a number“; scanf“d“, switcha/10 { case 10 case 9 m5; break; case 8 m4; break; case 7m3; break; case 6m2; break; defaultm1; } printf“md“,m; } 判断奇数和偶数 include main { int x; printf“Please a number “; scanf“d“, ifx20 printf“this is a oushu“; else printf“this is a jishu“; } 小写改大写，若是大写则不变 include main { char c1,c2; printf“ a letter\n“; scanf“c“, c2 a main { int x,n; printf“please a number“; scanf“d“, n0; whilex0 { xx/10; n; } printf“d“,n; } 输入一个数，判断它是几位数，然后逆序输出 include int main { int num; int len 0; int temp 0; printf“Please a number\n“; scanf“d“, whilenum 100 { temp temp*10num10; len; num num/10; } printf“length d\n“,len; printf“Reverse is d“, temp; } 打印水仙花数 include main { int x, a,b,c; forx100;x main { int sum,i,t; sum1; t1; fori3;i main { float s,t; int n,i,fz,fm; s0; fz2; fm1; printf“Enter n“; scanf“d“, fori1;i main { flo

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