View Compilation Error

0_0_23552857_27407.c: In function 'getsum':
0_0_23552857_27407.c:16:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i=0;i<26;i++){
     ^
0_0_23552857_27407.c:16:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_23552857_27407.c: In function 'main':
0_0_23552857_27407.c:58:36: error: expected expression before '/' token
             if(!isalpha(input[i])){//结束遍历
                                    ^
0_0_23552857_27407.c:58:36: error: stray '\275' in program
0_0_23552857_27407.c:58:36: error: stray '\341' in program
0_0_23552857_27407.c:58:36: error: stray '\312' in program
0_0_23552857_27407.c:58:36: error: stray '\370' in program
0_0_23552857_27407.c:58:36: error: stray '\261' in program
0_0_23552857_27407.c:58:36: error: stray '\351' in program
0_0_23552857_27407.c:58:36: error: stray '\300' in program
0_0_23552857_27407.c:58:36: error: stray '\372' in program