在什么地方我找不到 #include <stdio.h> int add(int x,int y) {return x+y;} int sub(int x,int y) {return x-y;} int mul(int x,int y) {return x*y;} int div(int x,int y) {return x/y;} int (*func[])()={add,sub,mul,div}; int num,curch; char chtbl[]="+-*/()="; char corch[]="+-*/()=0123456789"; int getach() { int i; while(1) { curch=getchar(); if(curch==EOF) return -1; for(i=0;corch[i]&&curch!=corch[i];i++); if(i<strlen(corch)) break; } return curch; }

int getid() { int i; if(curch>='0'&&curch<='9') { for(num=0;curch>='0'&&curch<='9';getach()) num=10*num+curch-'0'; return -1; } else { for(i=0;chtbl[i];i++) if(chtbl[i]==curch) break; if(i<=5) getach(); return i; } }

int cal() { int x1,x2,x3,op1,op2,i; i=getid(); if(i==4) x1=cal(); else x1=num; op1=getid(); if(op1>=5) return x1; i=getid(); if(i==4) x2=cal(); else x2=num; op2=getid(); while(op2<=4) { i=getid(); if(i==4) x3=cal(); else x3=num; if((op1/2==0)&&(op2/2==1)) x2=(*func[op2])(x2,x3); else { x1=(*func[op1])(x1,x2); x2=x3; op1=op2; } op2=getid(); } return (*func[op1])(x1,x2); }

void main(void) { int value; printf("Please input an expression:\n"); getach(); while(curch!='=') { value=cal(); printf("The result is:%d\n",value); printf("Please input an expression:\n"); getach(); } void main() { float c;

scanf("%c,%f",&f,&c);

c=5/9*(f-32); printf("f%.3f\n",c); getch(); } void main() { float mm,m;

scanf("%m,%f",&mm,&m); m=mm/1000 printf("%m,m=mm/1000,\n",m,); getch(); } }