View Compilation Error

0_0_2439100_16973.cpp:4: error: short, signed or unsigned invalid for `jiecheng'
0_0_2439100_16973.cpp: In function `long double jiecheng(long int)':
0_0_2439100_16973.cpp:6: error: short, signed or unsigned invalid for `y'
0_0_2439100_16973.cpp: At global scope:
0_0_2439100_16973.cpp:15: error: short, signed or unsigned invalid for `zuhe'
0_0_2439100_16973.cpp: In function `long double zuhe(long int, long int)':
0_0_2439100_16973.cpp:16: error: short, signed or unsigned invalid for `x'