#include<bits/stdc++.h> using namespace std; int main() { char a; cin>>a; if(a=='a'||a=='A') { cout<<1; } else if(a=='b'||a=='B') { cout<<2; } else if(a=='c'||a=='C') { cout<<3; } else if(a=='d'||a=='D') { cout<<4; } else if(a=='e'||a=='E') { cout<<5; } else if(a=='f'||a=='F') { cout<<6; } else if(a=='g'||a=='G') { cout<<7; } else if(a=='h'||a=='H') { cout<<8; } else if(a=='i'||a=='I') { cout<<9; } else if(a=='j'||a=='J') { cout<<10; } else if(a=='k'||a=='K') { cout<<11; } else if(a=='l'||a=='L') { cout<<12; } else if(a=='m'||a=='M') { cout<<13; } else if(a=='n'||a=='N') { cout<<14; } else if(a=='o'||a=='O') { cout<<15; } else if(a=='p'||a=='P') { cout<<16; } else if(a=='q'||a=='Q') { cout<<17; } else if(a=='r'||a=='R') { cout<<18; } else if(a=='s'||a=='S') { cout<<19; } else if(a=='t'||a=='T') { cout<<20; } else if(a=='u'||a=='U') { cout<<21; } else if(a=='v'||a=='V') { cout<<22; } else if(a=='w'||a=='W') { cout<<23; } else if(a=='x'||a=='X') { cout<<24; } else if(a=='y'||a=='Y') { cout<<25; } else if(a=='z'||a=='Z') { cout<<26; } return 0; }

A370.第几个字母

#include <bits/stdc++.h> using namespace std; int main(){ char a; cin>>a; if(a<='Z'&&a>='A') cout<<a-64; else cout<<a-96; return 0; }

#include <iostream> using namespace std; int main(){ char c;cin>>c; switch(c){ case 'A':cout<<1;break; case 'B':cout<<2;break; case 'C':cout<<3;break; case 'D':cout<<4;break; case 'E':cout<<5;break; case 'F':cout<<6;break; case 'G':cout<<7;break; case 'H':cout<<8;break; case 'I':cout<<9;break; case 'J':cout<<10;break; case 'K':cout<<11;break; case 'L':cout<<12;break; case 'M':cout<<13;break; case 'N':cout<<14;break; case 'O':cout<<15;break; case 'P':cout<<16;break; case 'Q':cout<<17;break; case 'R':cout<<18;break; case 'S':cout<<19;break; case 'T':cout<<20;break; case 'U':cout<<21;break; case 'V':cout<<22;break; case 'W':cout<<23;break; case 'X':cout<<24;break; case 'Y':cout<<25;break; case 'Z':cout<<26;break; } switch(c){ case 'a':cout<<1;break; case 'b':cout<<2;break; case 'c':cout<<3;break; case 'd':cout<<4;break; case 'e':cout<<5;break; case 'f':cout<<6;break; case 'g':cout<<7;break; case 'h':cout<<8;break; case 'i':cout<<9;break; case 'j':cout<<10;break; case 'k':cout<<11;break; case 'l':cout<<12;break; case 'm':cout<<13;break; case 'n':cout<<14;break; case 'o':cout<<15;break; case 'p':cout<<16;break; case 'q':cout<<17;break; case 'r':cout<<18;break; case 's':cout<<19;break; case 't':cout<<20;break; case 'u':cout<<21;break; case 'v':cout<<22;break; case 'w':cout<<23;break; case 'x':cout<<24;break; case 'y':cout<<25;break; case 'z':cout<<26;break; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { char a; cin>>a; if(a=='a'||a=='A') { cout<<1; } else if(a=='b'||a=='B') { cout<<2; } else if(a=='c'||a=='C') { cout<<3; } else if(a=='d'||a=='D') { cout<<4; } else if(a=='e'||a=='E') { cout<<5; } else if(a=='f'||a=='F') { cout<<6; } else if(a=='g'||a=='G') { cout<<7; } else if(a=='h'||a=='H') { cout<<8; } else if(a=='i'||a=='I') { cout<<9; } else if(a=='j'||a=='J') { cout<<10; } else if(a=='k'||a=='K') { cout<<11; } else if(a=='l'||a=='L') { cout<<12; } else if(a=='m'||a=='M') { cout<<13; } else if(a=='n'||a=='N') { cout<<14; } else if(a=='o'||a=='O') { cout<<15; } else if(a=='p'||a=='P') { cout<<16; } else if(a=='q'||a=='Q') { cout<<17; } else if(a=='r'||a=='R') { cout<<18; } else if(a=='s'||a=='S') { cout<<19; } else if(a=='t'||a=='T') { cout<<20; } else if(a=='u'||a=='U') { cout<<21; } else if(a=='v'||a=='V') { cout<<22; } else if(a=='w'||a=='W') { cout<<23; } else if(a=='x'||a=='X') { cout<<24; } else if(a=='y'||a=='Y') { cout<<25; } else if(a=='z'||a=='Z') { cout<<26; } return 0; }

#include<iostream> using namespace std; int main(){ char a; int n; cin>>a; if(a>='A' and a<='Z'){ n=a-'A'+1; } else n=a-'a'+1; cout<<n; return 0; }

#include <iostream> #include <string> #include <vector> int main() { stdstring s; stdcin >> s; }

#include<bits/stdc++.h> using namespace std; int main() { char a; cin>>a; if(a=='a'||a=='A') { cout<<1; } else if(a=='b'||a=='B') { cout<<2; } else if(a=='c'||a=='C') { cout<<3; } else if(a=='d'||a=='D') { cout<<4; } else if(a=='e'||a=='E') { cout<<5; } else if(a=='f'||a=='F') { cout<<6; } else if(a=='g'||a=='G') { cout<<7; } else if(a=='h'||a=='H') { cout<<8; } else if(a=='i'||a=='I') { cout<<9; } else if(a=='j'||a=='J') { cout<<10; } else if(a=='k'||a=='K') { cout<<11; } else if(a=='l'||a=='L') { cout<<12; } else if(a=='m'||a=='M') { cout<<13; } else if(a=='n'||a=='N') { cout<<14; } else if(a=='o'||a=='O') { cout<<15; } else if(a=='p'||a=='P') { cout<<16; } else if(a=='q'||a=='Q') { cout<<17; } else if(a=='r'||a=='R') { cout<<18; } else if(a=='s'||a=='S') { cout<<19; } else if(a=='t'||a=='T') { cout<<20; } else if(a=='u'||a=='U') { cout<<21; } else if(a=='v'||a=='V') { cout<<22; } else if(a=='w'||a=='W') { cout<<23; } else if(a=='x'||a=='X') { cout<<24; } else if(a=='y'||a=='Y') { cout<<25; } else if(a=='z'||a=='Z') { cout<<26; } return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ char a; cin>>a; if(a=='a'||a=='A'){ cout<<'1'; }else if(a=='b'||a=='B'){ cout<<'2'; }else if(a=='c'||a=='C'){ cout<<'3'; }else if(a=='d'||a=='D'){ cout<<'4'; }else if(a=='e'||a=='E'){ cout<<'5'; }else if(a=='f'||a=='F'){ cout<<'6'; }else if(a=='g'||a=='G'){ cout<<'7'; }else if(a=='h'||a=='H'){ cout<<'8'; }else if(a=='i'||a=='I'){ cout<<'9'; }else if(a=='j'||a=='J'){ cout<<"10"; }else if(a=='k'||a=='K'){ cout<<"11"; }else if(a=='l'||a=='L'){ cout<<"12"; }else if(a=='m'||a=='M'){ cout<<"13"; }else if(a=='n'||a=='N'){ cout<<"14"; }else if(a=='o'||a=='O'){ cout<<"15"; }else if(a=='p'||a=='P'){ cout<<"16"; }else if(a=='q'||a=='Q'){ cout<<"17"; }else if(a=='r'||a=='R'){ cout<<"18"; }else if(a=='s'||a=='S'){ cout<<"19"; }else if(a=='t'||a=='T'){ cout<<"20"; }else if(a=='u'||a=='U'){ cout<<"21"; }else if(a=='v'||a=='V'){ cout<<"22"; }else if(a=='w'||a=='W'){ cout<<"23"; }else if(a=='x'||a=='X'){ cout<<"24"; }else if(a=='y'||a=='Y'){ cout<<"25"; }else if(a=='z'||a=='Z'){ cout<<"26"; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { char a; cin>>a; if(a=='a'||a=='A') cout<<"1"; else if(a=='b'||a=='B') cout<<"2"; else if(a=='c'||a=='C') cout<<"3"; else if(a=='d'||a=='D') cout<<"4"; else if(a=='e'||a=='E') cout<<"5"; else if(a=='f'||a=='F') cout<<"6"; else if(a=='g'||a=='G') cout<<"7"; else if(a=='h'||a=='H') cout<<"8"; else if(a=='i'||a=='I') cout<<"9"; else if(a=='j'||a=='J') cout<<"10"; else if(a=='k'||a=='K') cout<<"11"; else if(a=='l'||a=='L') cout<<"12"; else if(a=='m'||a=='M') cout<<"13"; else if(a=='n'||a=='N') cout<<"14"; else if(a=='o'||a=='O') cout<<"15"; else if(a=='p'||a=='P') cout<<"16"; else if(a=='q'||a=='Q') cout<<"17"; else if(a=='r'||a=='R') cout<<"18"; else if(a=='s'|| a=='S') cout<<"19"; else if(a=='t'||a=='T') cout<<"20"; else if(a=='u'||a=='U') cout<<"21"; else if(a=='v'||a=='V') cout<<"22"; else if(a=='w'||a=='W') cout<<"23"; else if(a=='x'||a=='X') cout<<"24"; else if(a=='y'||a=='Y') cout<<"25"; else if(a=='z'||a=='Z') cout<<"26"; return 0; }

#include<bits/stdc++.h> using namespace std; int main() { char a; cin>>a; if(a>='A'&&a<='Z') cout<<a-'A'+1; else cout<<a-'a'+1; return 0; }

#include<iostream> using namespace std; int main(){ char a; int b=65,c=97,d=1; cin>>a; for(int i=1;i<=26;i++){ if(ab||ac){ break; } b++; c++; d++; } cout<<d; return 0; }

`#include <bits/stdc++.h> using namespace std; int main(){ char n; cin>>n; if(n>='a' and n<='z') cout<<(int)n-96; else if(n>='A' and n<='Z') cout<<(int)n-64; return 0; }``cpp

理论上来说，不使用26个分支是对手指和空间复杂度和时间复杂度友好的选择。 当然我不反对以上方法。 至少我使用的是以下方法。 「？？？」

#include <bits/stdc++.h> using namespace std; int main(){ char n; cin>>n; if(n>=97){ n=n-96; } if(n>=65){ n=n-64; } cout << (int)n; return 0; }