#include<stdio.h> int main(void) { double R,s; printf("Enter R:"); scanf("%lf",&R); if(R<=0){ printf("You are wrong. "); } else{ s=3.14*R*R; printf("f(%.2f)=%.2f ",R,s); } return 0; }
#include<stdio.h> int main(void) { int i,n; double R,V,H; printf("Enter n:"); scanf("%d",&n); printf("Enter H:"); scanf("%Lf",&H); printf("Enter R:"); scanf("%Lf",&R); if(R,H<=0){ printf("你的输入有误。 "); } else{ for(i=1;i<=n;i++){ V=3.14*R*R*H*i; printf("V=%.2f ",V); } } return 0; }
#include<stdio.h> int main() { int c1,c2,c3,c4; scanf("%d%d",&c1,&c2); printf("%d ",c1+c2); getchar(); c3 = getchar(); c4 = getchar(); printf("%d ",c3+c4); return 0; }
#include<stdio.h> int main() { char c1,c2,c3,c4; scanf("%c%c",&c1,&c2); printf("%c %c ",c1,c2); getchar(); c3 = getchar(); c4 = getchar(); printf("%c %c ",c3,c4); printf("%c %c %c %c ",c1,c2,c3,c4); return 0; }